HCS Version History

HCS2025 Release History

Release 8.4 (10/15/24)

HIGHWAY CAPACITY SOFTWARE

  • Adds Legacy HCS7 modules (HCM 6th Edition)
  • Adds Legacy HCS2010 Streets module (HCM 2010)
  • Adds Legacy HCS+ Arterials, Interchanges, and Signals modules (HCM 2000)

STREETS

  • Updates images of interchanges reports
  • Widens some input ranges
  • Fixes incorrect warning messages for RCUT volumes
  • Fixes mislabeled units for Access Point Location
  • Fixes infinity value incorrectly appearing on DDI interchanges report
  • Adds intersection names to Signals Multi-Period text report
  • Enables automatic calculation by default
  • Includes other minor bug fixes and improvements

TWSC

  • Widens some input ranges
  • Fixes negative probability queue-free state
  • Fixes display of queue-related results
  • Fixes RCUT warning messages
  • Includes other minor bug fixes and improvements

ROUNDABOUTS

  • Widens some input ranges
  • Includes other minor bug fixes and improvements
 MUTCD WARRANTS

  • Adds 11th Edition MUTCD method for Signal Warrants
  • Fixes issue opening files in incorrect units
  • Updates Warrants logo
  • Includes other minor bug fixes and improvements

FREEWAYS

  • Adds HCM 7.1 (NCHRP 07-26) method for single segment merge, diverge, and weaving analyses
  • Adds single segment examples for HCM 7.1 (NCHRP 07-26) method
  • Adds work zone analysis for merge, diverge, and weaving segments
  • Adds non-work zone speed limit input
  • Widens some input ranges
  • Allows modeling lane add/drop for two-lane ramps
  • Improves logic to lane add/drop for both one-lane and two-lane ramps
  • Fixes incorrect capacity calculations for managed lane merge/diverge/weaving
  • Adds I-4 (Florida) sample data to segmentation database
  • Supports metric units for map segmentation
  • Allows users to insert on-ramp and off-ramp nodes in map segmentation
  • Includes SAF and CAF as global inputs
  • Corrects safety results
  • Includes other minor bug fixes and improvements

HIGHWAYS

  • Adds Two-Lane Highway Facility formatted report
  • Widens some input ranges
  • Corrects incorrect facility travel time
  • Corrects LOS computation based on speed limit
  • Provides warning message when length of passing lanes is larger than 3 miles in two-lane highways
  • Includes other minor bug fixes and improvements

HCS2024 Release History

HIGHWAY CAPACITY SOFTWARE

  • Removes Highway Safety Software from HCS suite

STREETS

  • Fixes incorrect O-D figure labels and images of interchanges reports for different forward directions
  • Fixes missing lane graph issues when printing formatted reports
  • Includes other minor bug fixes and improvements

STREETS RELIABILITY

  • Corrects metric labels in text report
  • Includes other minor bug fixes and improvements

TWSC

  • Adds Stored Passenger Car Length and Stored Heavy Vehicle Length inputs
  • Provides 95th Percentile Queue Length in ft and m in reports
  • Fixes missing lane graph issues when printing formatted reports
  • Includes other minor bug fixes and improvements

AWSC

  • Adds Stored Passenger Car Length and Stored Heavy Vehicle Length inputs
  • Provides 95th Percentile Queue Length in ft and m in reports
  • Fixes missing lane graph issues when printing formatted reports
  • Includes other minor bug fixes and improvements

ROUNDABOUTS

  • Adds Stored Passenger Car Length and Stored Heavy Vehicle Length inputs
  • Provides 95th Percentile Queue Length in ft and m in reports
  • Fixes missing lane graph issues when printing formatted reports
  • Includes other minor bug fixes and improvements

MUTCD WARRANTS

  • Corrects Warrant 3 delay checking
  • Adds automatic conversion between delay in s/veh and delay in veh-hr
  • Includes other minor bug fixes and improvements

FREEWAYS

  • Includes undo and redo features for freeways and freeways reliability analysis
  • Revamps and improves calibration table, including ability to copy/paste data
  • Improves map-based segmentation by updating logic to save and load map data
  • Improves performance for Freeways for full view, service volume analysis, and design analysis
  • Allows review of saved map data in map-based segmentation
  • Adds safety results to individual segment and facility formatted reports
  • Corrects graph of weaving segments with 2-lane ramps
  • Adds hourly distribution data and related selection to the segmentation database
  • Adds ‘Update Safety Results’ button to refresh safety analysis results
  • Fixes saving of ramp side for managed lanes
  • Includes other minor bug fixes and improvements

HIGHWAYS

  • Adds map-based segmentation
  • Includes undo and redo features
  • Includes global inputs for two-lane highway facility analysis
  • Adds safety results to individual segment and facility formatted reports
  • Adds ‘Update Safety Results’ button to refresh safety analysis results
  • Displays FDmid value for passing lanes on graphs instead of FD
  • Includes other minor bug fixes and improvements

SERVICE VOLUMES

  • Includes undo and redo features

NETWORK

  • Includes undo and redo features

HCS2023 Release History

HIGHWAY CAPACITY SOFTWARE

  • Adds new option for silent installation
  • Removes newsletter portion of the activation procedure

STREETS

  • Adds connected and automated vehicle (CAV) effects on saturation flow rates
  • Fixes hidden back-of-queue on reports
  • Disables base saturation flow rate for invalid movements
  • Removes Speed Limit to Base FFS Ratio from UI
  • Redesigns icons
  • Addresses circular dependency error for some interchange intersections
  • Includes other minor bug fixes and improvements

TWSC

  • Adds optional calibration for conflicting flow factors
  • Includes other minor bug fixes and improvements

AWSC

  • Improves format of the formatted report to be printed on one page
  • Combines Approach Delay and Approach LOS rows in formatted report
  • Includes other minor bug fixes and improvements

ROUNDABOUTS

  • Improves format of the formatted report to be printed on one page
  • Includes other minor bug fixes and improvements

FREEWAYS

  • Adds map-based segmentation
  • Allows importing facilities from precoded segmentation database
  • Updates the facility graph
  • Adds a new Calibration page to show input parameters and background colors based on outputs on the same table
  • Displays safety analysis results in text reports for freeway segments based on Chapter 18 of Highway Safety Manual (HSM) 1st Edition
  • Adds Proportion of CAVs and Ramp Demand Adjustment Factors to Segments Global Inputs
  • Adds input for Vehicle Value of Time (VOT) and result for Total Delay Cost
  • Implements connected and automated vehicle (CAV) service volume tables in text reports
  • Applies FFS instead of Adjusted FFS to compute Base Segment Capacity based on errata of 7th Edition of HCM
 FREEWAYS (cont.)

  • Updates computation of Adjusted Breakpoint and related outputs in reports based on errata of 7th Edition of HCM
  • Corrects LOS when d/c > 1 for Diverge segment analyzed as Basic
  • Corrects LOS when d/c > 1 for Weaving segment in a facility analysis
  • Sets LOS to F when queue is present
  • Fixes enabling/disabling of cross-weaving effects for on-/off-ramp GP segments based on adjacent ML Access segments
  • Adds warning message to advise use of freeway facility analysis when LOS is F in single segment analysis
  • Adds warning message for CAF of CAV when weaving demand-based capacity is used
  • Includes other minor bug fixes and improvements

HIGHWAYS

  • Displays safety analysis results in text reports for highway segments based on Chapters 11 and 12 of Highway Safety Manual (HSM) 1st edition
  • Updates Two-Lane chart to use Adjusted Follower Density instead of Follower Density
  • Updates Two-Lane reports when d/c > 1
  • Fixes incorrect chart colors for speed and follower density in Two-Lane Highways
  • Includes other minor bug fixes and improvements

SERVICE VOLUMES

  • Implements connected and automated vehicle (CAV) service volume tables in text reports

NETWORK

  • Adds new Network module to provide network-level spillback analysis based on Chapter 38 of 7th Edition of HCM
  • Adds modeling of network with urban street facilities and freeway facilities
  • Estimates O-D-based travel time

HIGHWAY SAFETY SOFTWARE

  • Allows opening of *.xuf files by converting HCS Freeways and Highways facilities to HSS facilities
  • Includes other minor bug fixes and improvements

Note: HCS2023 implements the seventh edition of the Highway Capacity Manual

HCS2022 Release History

HIGHWAY CAPACITY SOFTWARE

  • Upgrades the installation and software activation procedures with up-to-date protection
  • Completely redesigns the main menu UI and functionality

STREETS

  • Adds metric unit system support
  • Redesigns module icon, ‘About HCS’ window, and start page
  • Improves import/export functionality and supports new format of CSV files
  • Integrates Synchro-To-Streets
  • Updates one-click CORSIM animation functionality to support incoming TSIS-CORSIM 2022
  • Adds safety and emissions results to reports
  • Fixes Streets files not opening when double-clicked in File Explorer
  • Adds new warning message for DDI HCM limitation
  • Includes other minor bug fixes and improvements

STREETS RELIABILITY

  • Adds metric unit system support
  • Redesigns module icon, ‘About HCS’ window, and start page
  • Adds Project Properties
  • Includes other minor bug fixes and improvements

WARRANTS

  • Adds metric unit system support
  • Redesigns module icon, ‘About HCS’ window, and start page

TRANSYT-7F

  • Redesigns module icon, ‘About TRANSYT-7F’ window, and introduction page
  • Fixes crash issue for large screen resolution and duplicate registry paths
  • Includes other minor bug fixes and improvements

TWSC

  • Adds metric unit system support
  • Redesigns module icon, ‘About HCS’ window, and start page
  • Updates pedestrian mode methodology
  • Updates conflicting flow methodology
  • Updates flared minor-street lane effects methodology
  • Adds shared major-street lane effects methodology
  • Updates control delay to rank 1 movements methodology
  • Updates one-click CORSIM animation functionality to support incoming TSIS-CORSIM 2022
  • Includes other minor bug fixes and improvements

AWSC

  • Adds metric unit system support
  • Redesigns module icon, ‘About HCS’ window, and start page
  • Updates one-click CORSIM animation functionality to support incoming TSIS-CORSIM 2022

ROUNDABOUTS

  • Adds metric unit system support
  • Adds connected and automated vehicle (CAV) effects on capacity adjustment factors
  • Redesigns module icon, ‘About HCS’ window, and start page
  • Updates one-click CORSIM animation functionality to support incoming TSIS-CORSIM 2022
  • Updates bypass lane graphics and adds tooltips for lanes graphic
  • Includes other minor bug fixes and improvements
 FREEWAYS

  • Adds connected and automated vehicle (CAV) effects on capacity adjustment factors
  • Implements CAV service volume tables
  • Implements new lane-by-lane methodology
  • Includes O-D results in reports
  • Supports new managed lane segment types
  • Integrates reliability analysis within module
  • Redesigns module icon, ‘About HCS’ window, and start page
  • Updates one-click CORSIM animation functionality to support incoming TSIS-CORSIM 2022
  • Upgrades facility graph to support lane-by-lane results and new types of managed lane segments
  • Implements new design for acceleration lane and deceleration lane on facility graph
  • Updates colors for heatmap and facility graph
  • Corrects LEQ computing by considering upstream and downstream ramp demands in facility analysis
  • Limits vR12 to Maximum Desirable Flow Rate for speed index for on-ramp (Ms) computation
  • Corrects work zone FFS computation by limiting the speed ratio between lowerbound and upperbound
  • Corrects results of merge segment and adds vF to results page for oversaturated analysis
  • Adds new messages when FFS is out of range for basic segments and C-D roadways
  • Includes other minor bug fixes and improvements

FREEWAYS RELIABILITY

  • Redesigns module icon, ‘About HCS’ window, and start page

SERVICE VOLUMES

  • Implements connected and automated vehicle (CAV) service volume tables
  • Redesigns module icon, ‘About HCS’ window, and start page
  • Corrects multilane service volume flow computation
  • Includes other minor bug fixes and improvements

HIGHWAYS

  • Combines Multilane and TwoLane modules into one module
  • Adds Full View support for two-lane facility analysis
  • Implements import/export CSV files for multilane and two-lane analyses
  • Determines FD of facility using FD of midpoint for passing lanes, compliant with HCQSC interpretation
  • Redesigns module icon, ‘About HCS’ window, and start page
  • Displays VMT and VHD results on two-lane reports
  • Includes other minor bug fixes and improvements

HIGHWAY SAFETY SOFTWARE

  • Adds metric unit system support
  • Allows coding of ramp and freeway into one facility
  • Adds Full View support
  • Redesigns module icon, ‘About HCS’ window, and start page
  • Adds new graphs for freeway segments
  • Includes other minor bug fixes and improvements

Note: HCS2022 implements the seventh edition of the Highway Capacity Manual

HCS7 Release History

FREEWAYS

  • Allows importing/exporting of Access Demand for Managed Lanes
  • Fixes unsaved Freeway-to-Freeway demand in single segment Weaving analyses
  • Fixes increasing Freeway demand for the first segment in facility analyses with cross weaving
  • Includes other minor fixes and improvements

FREEWAYS RELIABILITY

  • Corrects Average Density results when exporting summary results to CSV
  • Includes other minor bug fixes and improvements
 TWO-LANE

  • Adds Full View option to view inputs and report simultaneously
  • Includes other minor bug fixes and improvements

MULTILANE

  • Adds Full View option to view inputs and report simultaneously
  • Includes other minor bug fixes and improvements

SERVICE VOLUMES

  • Includes other minor bug fixes and improvements

STREETS

  • Includes other minor fixes and improvements

TWSC

  • Includes other minor fixes and improvements

FREEWAYS

  • Implements new design and significant fixes for freeway facility graphic
  • Adds Full View for facility analysis
  • Adds option to animate between analysis periods for freeway facility graphic
  • Implements new design of heat map report
  • Allows changing of unit systems without the closing file
  • Allows user-entered input of Work Zone FFS
  • Limits ramp flow rate when greater than ramp capacity
  • Corrects off-ramp flow rate of weaving segment in oversaturated conditions
  • Includes other minor fixes and improvements
 FREEWAYS RELIABILITY

  • Displays TTI distribution chart in formatted report
  • Adds new performance measure LOTTR
  • Allows export TTI in all analysis periods to CSV
  • Allows input of Special Event Scenario Name
  • Includes other minor bug fixes and improvements

TWO-LANE

  • Corrects negative PF25cap and PFcap

MULTILANE

  • Implements redesign of formatted and text reports
  • Allows import/export from/to CSV

HIGHWAY SAFETY SOFTWARE

  • Includes other minor bug fixes and improvements

MUTCD Signal Warrants

  • Corrects Warrant 4 total pedestrian and alternate figure speed conditions

STREETS

  • Improves the signals multiple-period text report and export to CSV file functionality
  • Corrects a display issue for queue storage ratio with zero storage
  • Includes other minor fixes and improvements

FREEWAYS

  • Adds simulation and animation support for TransModeler traffic simulation software
  • Adds TTI on facility graph
  • Updates upper range of segment length and accel/deceleration lane length for Merge/Diverge segments
  • Allows users to code access demand between ML lanes and GP lanes
  • Adds ramp types on formatted reports
  • Corrects a bug with oversaturated analysis
  • Includes other minor bug fixes and improvements

TWSC

  • Adds simulation and animation support for TransModeler traffic simulation software
  • Corrects shared capacity for minor street approaches

AWSC

  • Adds simulation and animation support for TransModeler traffic simulation software

STREETS

  • Corrects the red-color results display issue for unsignalized movements in some cases
  • Improves the command line functionality
  • Displays optimization process details in command line processing

TWSC

  • Corrects text report display issue related to shared capacity and flared capacity
  • Calculates Vc,min (Eq. 20-33) by looking at the opposing approach thru lanes (instead of the current approach)
  • Corrects use of headways when the number of through lanes differ for the major street approaches

FREEWAYS

  • Includes graphs in the facility formatted report
  • Adds more options to the Default Settings for specifying the formatted report and CSV file export settings
  • Provides volumes in exported CSV files
  • Implements major diverge analysis functionality
 MULTILANE

  • Adds error checking and information button and popup to provide real-time error checking messages
  • Corrects the mean speed calculation issue

TWOLANE

  • Adds new charts for follower density and speed distribution to the formatted report
  • Fixes crash issue when grade > 0 and grade < 1 for some cases

HIGHWAY SAFETY SOFTWARE (HSS)

  • Adds the new roundabouts analysis procedure
  • Allows users to code parameters for each segment and intersection
  • Implements crash distribution tables for rural and urban facilities
  • Allows import/export parameters template to apply state/local factors
  • Adds new error and warning conditions to validate input data

STREETS

  • Adds interchange-wide ETT and LOS computation
  • Corrects the calculation and display of O-D movement A, M and N demands in the interchanges results report
  • Updates the phase duration graphic to display the flashing yellow arrow and Dallas left-turn phasing options
  • Fixes the display of U-Turn Volume inputs for interchanges

ROUNDABOUTS

  • Adds lanes graphic to the formatted report

TWSC

  • Corrects a display issue for the RCUT report
  • Updates flow-balancing warning message for RCUT

FREEWAYS

  • Adds metric unit system support for freeway facilities and travel time reliability
  • Increases the Capacity Adjustment Factor (CAF) upper limit to 2 to allow for AV/CV and other applications
  • Adds more conditions to check merge and diverge segment lane additions and lane drops to analyze as basic segment
  • Corrects the speed ratio implementation in the work zone analysis
 MULTILANE

  • Adds metric unit system support

TWO-LANE

  • Implements the new two-lane highways committee-approved chapter of the HCM
  • Includes a wholly completely redesigned module with a new user interface and modern architecture
  • Provides segment and facility analyses within the same interface
  • Supports metric unit system

SERVICE VOLUMES

  • Adds metric unit system support

STREETS

  • Adds simulation and animation support for TransModeler traffic simulation software developed by Caliper Corporation
  • Replaces the Quick Animation button on the toolbar to run TransModeler instead of TSIS-CORSIM
  • Adds an error check to ensure storage length does not exceed segment length

TWSC

  • Allows coding of a U-turn lane even if side street exists
  • Corrects the UI display of RCUT sections in full view for some files
  • Fixes the display of RCUT control delay and ETT on RCUT report for some cases

FREEWAYS

  • Implements planning level analysis for freeway facilities
  • Implements design analysis for individual segments
  • Adds managed lane inputs to the global inputs
  • Removes the density at capacity input from global inputs
  • Corrects LOS results when off-ramp demand-to-capacity ratio is larger than 1
  • Improves the facility graph layout to fit long facilities
  • Adds new error and warning conditions to validate input data
  • Displays on-ramp queue and mainline queue on the facility text report for oversaturated analyses
  • Displays VMT-Demand for the facility on the facility text report
  • Reliability Analysis: adds planning level analysis
 HIGHWAY SAFETY SOFTWARE (HSS)

  • Automatically calculates the proportion of AADT during high volume hours which can be overwritten if necessary
  • Displays both expected and predicted number of crashes in the facility overview table
  • Allows changing the section type (segment/intersection) in the facility overview table

SERVICE VOLUMES

  • Improves full view performance

MUTCD Signal Warrants

  • Corrects Warrants 2 and 3 lane-checking conditions for some cases

STREETS

  • Updates the lane utilization factor calculation for a DDI
  • Adds F1 help topics for safety and emission-related optimization inputs

ROUNDABOUTS

  • Corrects the LOS threshold A for segment analysis

TWSC

  • Corrects capacity calculation for LR and LTR configuration with a flared approach
  • Adds a flow balance check for RCUT and its conventional intersection
  • Corrects usages of the probability of a queue-free state in calculations when there is a major-street shared LT lane or a short left-turn pocket
  • Converts the proportion of time blocked value usage for two-stage crossing cases
  • Corrects the determination logic for T-intersection and related calculation
  • Changes the default value of critical headway from 0 to 2 seconds
  • Fixes the movement delay and LOS display issue for major-street right turns
 FREEWAYS

  • Adds error checking and information button and popup to provide real-time error checking messages
  • Implements auto segmentation to code a facility from sections
  • Allows opening and saving CSV files
  • Adds the ability to view service volume tables for single-segment analyses
  • Updates the facility graph to display colors, legends and tool tips
  • Adds new charts such as volume served, density and speed distributions
  • Implements printing all single-segment reports in a facility
  • Updates the heat map report design
  • Allows print and print preview for heat map report
  • Adds converting text and formatted reports to XPS files from the command line
  • Corrects weaving capacity in the oversaturated calculation
  • Fixes LCRR range for two-sided weave analysis
  • Corrects equations for managed lane speed calculation and saving issue
  • Reliability Analysis: adds new charts to display speed and density distributions

SERVICE VOLUMES

  • Corrects ramp service volume calculation
  • Adds converting text and formatted reports to XPS files on command lines

MUTCD Signal Warrants

  • Replaces the old Warrants module with a wholly redesigned newer version

STREETS

  • Adds a larger and direction-oriented interchange graphic as the second page to the interchanges report
  • Corrects the interchange O-D movement LOS computation for some cases by correctly applying all of the ETT, v/c > 1 and Rq > 1 conditions
  • Improves the display of text inputs on report for the inputs containing -1
  • Corrects the right-turn overlap phase display by showing it only when an exclusive right-turn lane exists
  • Removes the Heavy Vehicle Equivalency row of inputs
  • Corrects the standard deviation and 95th% confidence interval calculations in reliability analysis for multiple replication files

ROUNDABOUTS

  • Corrects the delay due to turning vehicles calculation
  • Adds command-line functionality to batch process files, print text reports, update old files etc.
  • Corrects the usage of intersection/segment in text report

TWSC

  • Improves program speed and accuracy by completely revamping the internal architecture of this module
  • Expedites coding of MUT/RCUT crossover intersections by adding a checkbox to designate a crossover intersection
  • Implements and displays approach and intersection ETT and LOS calculations for RCUT intersections
  • Adds command line functionality to batch process files, print text reports, update old files etc.
  • Makes the headway and percent thrus using shared lane inputs user entered or calculated
  • Adds error checking and information button and popup to provide realtime error checking messages

AWSC

  • Displays a PHF message box on importing *.xhu files
  • Adds command-line functionality to batch process files, print text reports, update old files etc.
 FREEWAYS

  • Includes several improvements to the facility graph for ramp lanes, managed lanes, left-side ramps, two-sided weave etc.
  • Adds segment selection and navigation through the facility graph
  • Highlights selected segment in the facility graph
  • Updates the facility text report to show additional facility-wide outputs such as VMT, VHT and VHD
  • Adds the full view option for single-segment analyses to view inputs and report at the same time
  • Improves animation of left-side ramps and two-sided weaving segments
  • Corrects the display of the number of segments in the facility text report
  • Corrects equations for Merge/Diverge analyses with more than four freeway lanes
  • Sets accel/decel lane lengths to 1500 when the calculated length is more extensive than 1500 in Merge/Diverge
  • Reliability Analysis: Corrects calculation of incidents when using the “Calculated Crash Frequency” option
  • Reliability Analysis: Improves randomness of weather event assignment
  • Reliability Analysis: Corrects Special Event analysis and adds an option for users to use a date to add a special event
  • Reliability Analysis: Replaces TTImax with TTI95 to more closely match HCM reporting guidelines

MULTILANE

  • Adds the ability to model Bicycle LOS procedure
  • Corrects the issue with remembering report zoom level

HIGHWAY SAFETY SOFTWARE (HSS)

  • Adds the Empirical Bayes (EB) analysis capability
  • Adds the ability to perform economic analysis

SERVICE VOLUMES

  • Imports data from Freeways (XUF) files to eliminate the need to code the data twice
  • Updates reports to display the full-service volume tables
  • Adds the full view option to view inputs and report at the same time

STREETS

  • Adds a new heat map report
  • Adds safety and emissions based signal-timing optimization capabilities
  • Updates the Pedestrian, Bicycle and Transit procedure implementation to use the HCM6 equations
  • Allows buses to be coded with or without the presence of right-turn lanes
  • Improves the automatic refreshing of reports

ROUNDABOUTS

  • Corrects the animation issue related to specific file names

TWSC

  • Adds step-10 section to text report for all cases
  • Corrects shared capacity calculation for files with a flared lane present

AWSC

  • Corrects the issue with remembering report zoom level
 FREEWAYS

  • Adds the ability to include special events in travel time reliability analysis
  • Improves the CSV file functionality
  • Allows the animation of files containing multiple segments and multiple periods
  • Adds the ability to see detailed reports for individual segments in a facility analysis
  • Corrects the display of missing weaving demand data inputs for screens with low resolution
  • Displays a new segment graphic on the segment details screen

MULTILANE

  • Adds the ability to model Bicycle LOS procedure
  • Corrects the issue with remembering report zoom level

HIGHWAY SAFETY SOFTWARE (HSS)

  • Adds the ability to model Freeway and Ramp safety analyses
  • Adds formatted reports
  • Implements F1 help feature

TOOLS

  • Adds a new HCS Service Volumes module

STREETS

  • Adds a new intersection summary report
  • Corrects missing timing data issues for certain uncoordinated intersection files
  • Adds the ability to model side street split phasing with right turn overlap
  • Updates the icon for the Streets Reliability module

ROUNDABOUTS

  • Adds Roundabout Segment analysis
  • Adds one-click CORSIM animation functionality

TWSC

  • Adds one-click CORSIM animation functionality
  • Corrects headway default value setting based on lane configuration
 AWSC

  • Adds one-click CORSIM animation functionality

FREEWAYS

  • Implements travel time reliability for freeway facilities
  • Adds one-click CORSIM animation functionality for single-period files
  • Improves the interoperability with MS Excel thru CSV file import and export
  • Adds a new color-coded Heat Map report
  • Implements the mixed-flow model for composite grades
  • Improves the weaving segment input page

TOOLS

  • Adds a new Highway Safety Software module

STREETS

  • Adds phasing and timing summary report
  • Corrects a Lead/Lag issue for major street left turns for certain cases
  • Adds general data to text reports

ROUNDABOUTS

  • Adds fields for Passenger Car Equivalent
 FREEWAYS

  • Adds cross-weaving effect for a Merge/Diverge analysis
  • Adds events and adjustment factors to Facility text report
  • Adds Proportion of Flow Outside 4th Lane field for a Merge/Diverge analysis when necessary
  • Adds range display when hovering over inputs
  • Corrects display of the number of managed lanes in Facility Graphic

STREETS

  • Adds the ability to model Diverging Diamond Interchanges (DDI)
  • Adds interchange O-D graphics to the interchanges report
  • Updates the Segment Auto LOS threshold for LOS A
  • Adds the ability to export Signals and Streets multiple-period results to CSV files
  • Updates the layout of the Streets multiple-period text report
  • Adds the graphical summary to the full report
 FREEWAYS

  • Adds import/export demand data features
  • Auto calculates total ramp density and interchange density for a facility
  • Adds Managed Lanes analysis for the Merge, Diverge and Weaving segments
  • Adds facility geometry graphic

STREETS

  • Adds analysis of alternative intersections (MUT, RCUT and DLT)
  • Implements travel time reliability for urban street facilities
  • Incorporates unsignalized movements into signalized intersection delay averages
  • Modifies the grade and heavy vehicle adjustments to saturation flow rate
  • Adds parking activity and calibration factor to base free-flow speed computations
  • Changes LOS A threshold in urban streets

ROUNDABOUTS

  • Updates capacity equations to reflect the latest research and increased capacity for all scenarios
 FREEWAYS

  • Includes completely redesigned module to provide for segment and facility analyses within the same environment
  • Adds modeling of managed lanes for continuous access, buffer and barrier designs
  • Incorporates new truck procedures
  • Adds capacity and speed adjustment factors for weather, incidents and driver population
  • Uses revised speed flow curves
  • Adds cross-weave analysis for on- and off-ramps near managed lane access points
  • Adds density computed across all lanes in merge and diverge analyses

MULTILANE

  • Includes completely redesigned module with a new user interface and modern architecture
  • Implements the expansion of free-flow speed to 65 and 70 mi/h
  • Accommodates density of 45 pc/mi/ln as the LOS E/F boundary
  • Incorporates new truck procedures

Note: HCS7 implements the sixth edition of the Highway Capacity Manual.

HCS2010 Release History

FACILITIES

  • Completely redesigned module with a new user interface and modern architecture

AWSC

  • Completely redesigned module with a new user interface and modern architecture
  • Three-lane approaches modeled and 95th Percentile queue results displayed

TWSC

  • Implemented Pedestrian LOS procedure
  • Added code to handle foreign cultures and language format
  • Corrected display of Flow Rate and v/c ratio for major street left turn for the left-thru shared lane cases
  • Added keyboard shortcuts for Back and Next buttons
 ROUNDABOUTS

  • Added code to handle foreign cultures and language format
  • Updated Roundabouts.chm help file
  • Added keyboard shortcuts for Back and Next buttons

STREETS

  • Added a new signalized intersection graphical summary report

ROUNDABOUTS

  • Completely redesigned new user interface with two data entry modes

FACILITIES

  • Corrected a Ramp Density issue for specific datasets
  • Expanded the range allowed for ramp demand values to accommodate two-lane weaving
  • Fixed a report issue that caused segment LOS table to be empty if the file contained exactly 15 segments

TWSC

  • Removed major streets LOS from both reports
  • Made intersection delay appear as blank on the text report when the capacity/delay for an existing approach is invalid
  • Corrected approach delay calculation for LT TR configuration on the minor street
  • Several minor user interface improvements and calculation corrections including shared-lane capacity calculations
  • Corrected Left-only median type operations
 STREETS

  • Few minor user interface improvements

AWSC

  • Added the computation of 95th Percentile Queue by lane as prescribed in the HCM 2010

TWO-LANE

  • Revised computation of capacity values when opposing flows dictate other than 1700

TWSC

  • Completely redesigned user interface with two data entry modes
  • Up to six lanes on the major street now accommodated, including U-turns
  • Proportion time blocked incorporated from Streets for upstream signals
  • Short lane modeling added to the Rank 1 delay computations

STREETS

  • Added a new Interchanges Text Report to show intermediate results
  • Several minor corrections including removal of a redundant File Save As dialog
  • Corrected a problem when optimizing some multiple period datasets
  • Several minor improvements including results in red when QSR exceeds 1
 FACILITIES

  • Corrected a formatted report issue with weaving lane change labels
  • Updated images on Weaving Input Data screen to better reflect segment length

STREETS

  • Added Segment Travel Time to the Segment Results Report
  • Enabled editing red clearance and yellow time for more scenarios
  • Corrected the range for Approach Width for work zones
  • Updated the XUS file for additional outputs and improved its readability
  • Corrected issues with lane configuration, grade and lag phase coding for some data sets
 QUICK STREETS

  • Added a new File Save feature
  • Improved tool-tips and updated the Users Guide
  • Modified unit labels for consistency with Streets

STREETS

  • Added a Phasing Wizard button to generate a dialog for guided phase coding
  • Added a Pre-Timed Signal checkbox to define pre-timed operations with one-click
  • Implemented Closely Spaced Intersections for Interchange Ramps Terminals analysis
  • Implemented adding and deleting any intersection within the urban street
  • Updated display settings to better support Windows 8 defaults
  • Implemented Saturation Flow Adjustment Factor for Work Zones
  • Updated the Turn Radius inputs to compute Turn Equivalency Factors per lane group
  • Added Quick Streets (Excel Add-in) to facilitate importing count data from other sources
 FACILITIES

  • Implemented HCM update to add density criterion for LOS F to weaving segment analysis
  • Updated the startup screen to improve file access functionality
  • Fixed issue showing LOS based on density with d/c > 1 for some data sets
  • Resolved report display issue that required a user to view overall results first
  • Corrected Weaving data input screen related to Short Length and Weave Configuration

WEAVING

  • Implemented HCM update to add density criterion for LOS F to weaving segment analysis

STREETS

  • Implemented HCM 2010 Interchange Ramp Terminals (Chapter 22) procedures
  • Added Reports for Interchange Ramp Terminals and Multiple Period Analysis
  • Added pedestrian crossings and right-turn overlap phasing to Phasing View
  • Improved the Streets startup screen and added a Video Tutorial to Help
 ROUNDABOUTS

  • Added Quick Entry for graphic lane configuration coding

STREETS

  • Updated animation converter to support foreign locales

ROUNDABOUTS

  • Corrected pedestrian adjustment to capacity for two-lane approaches
 TWSC

  • Reverted to version 5.6 temporarily

FACILITIES

  • Added the Quick Animation feature
  • Miscellaneous updates and corrections

STREETS

  • Implemented an HCQS change for certain permitted, shared left-turn situations
  • Added a newly formatted report for access points
  • Added a peak hour factor for access points
  • Implemented the ability to hide multimodal outputs
  • Time-space diagram corrections to the slope of progression bands
 ROUNDABOUTS

  • Corrected capacity computations for certain situations
  • Modified lane assignments for certain situations
  • Miscellaneous user-interface corrections

TWSC

  • Updated to add six-lane major street analysis including U-turns

SIGNALS

  • Signals analysis is now performed within the new Streets module

STREETS

  • New module
  • Coordination & access points
  • Multimodal analysis for pedestrian, bicycle, and transit level of service
  • Visual mode and tabular data
  • HCM based internal genetic algorithm optimization
  • Improved shared-plus-exclusive lane handling
  • Dynamic time-space diagram
  • Flow profile diagram
  • Auto calculate and force calculate buttons to control the speed of data input
 TWOLANE

  • Included a PFFS (Percent Free Flow Speed) and adjusted LOS for passing lane analysis
  • Fixed passing lane values for when the passing lane becomes truncated
  • Adjusted the Access Point Density to not “correct” itself to a default value

FACILITIES

  • New module

SIGNALS

  • Improved loading and refreshing of the screen
  • Corrected reports showing single lane data in the left or right columns
  • Updated help file to be more comprehensive
  • Corrected some printing issues

ROUNDABOUTS

  • Fixed some lane configuration issues
  • Included new template file that allows animating a two-lane roundabout
 WEAVING

  • Corrected saving and loading of two-sided weaving in datasets
  • Corrected weave.rpt file that had the v_RF and v_FR labels switched in the “Conversions to pc/h Under Base Conditions” portion of the Formatted Report

TWO-LANE

  • Corrected capacity computations for certain situations
  • Added help file

HEAVY VEHICLES

  • Updated Trucks, Buses and RVs ranges (0% to 100% replaces 0% to 25%) for Freeways, Multilane and Ramps

Release 6.1 (04/01/11) Initial Release

HCS+ Release History

SIGNALS

  • Implemented the ability to import TWSC data sets for signalized analysis, except for pedestrian data
  • Corrected a situation where volumes could change when navigating through periods in a multiple-period analysis
  • Modified the effective green computation to more appropriately handle some three phase data sets
  • Ensured computation of the d1 value for certain data sets with g/C equal to 1.0
  • The right turn adjustment factor, fRpb, is now displayed correctly for shared or exclusive lanes in the supplemental pedestrian-bicycle worksheet
  • The Planning option chooses properly whether to use permitted or protected phasing

DAITA

  • Updated to explicitly provide for importing heavy vehicle percentage and right turn on red, pedestrian and bicycle volume data into Signals.
  • Modified lane configuration, unmet demand and queue distributions to more accurately account for shared lane situations.
 LOSPLAN

  • Updated ARTPLAN and HIGHPLAN versions from the Florida DOT

WARRANTS

  • The Summary formatted report now displays peds, gaps and delay averages properly

TRANSYT-7F

  • Modified to remain consistent for importing the updated version of ARTPLAN.

ALL MODULES

  • Convert Windows Help (.HLP) files to HTML Help
    (.CHM) files for added functionality and to be compatible with Windows Vista

INTERCHANGES

  • Added SPUI to the types of interchanges analyzed in this module
 DAITA

  • Added residual queue distance fields and logic to produce actual demand flow rates for use in Signals multiple-period analyses

TRANSYT-7F

  • Updated to version 11.3

TRANSYT-7F

  • Integrate release 11.2 of TRANSYT-7F with HCS+ in HCS+T7F, with the ability to import all HCS- Signals and HCS-Interchanges data files for optimization and one-touch CORSIM animation

INTERCHANGES

  • Initial release of the Interchanges module to implement the procedures of the update HCM Chapter 26 on Interchange Ramp Terminals

MAIN MENU

  • Modified to account for Windows adjustments to the DPI settings for individual computers

SIGNALS

  • Restored the warning message for violation of the Minimum Pedestrian Green times as compared with the Phasing Design parameters
 UNSIGNAL

  • TWSC implemented an interpretation from the HCQS committee to separate raised median and TWLTL as applied to two-stage gap acceptance for minor street left turns
  • TWSC modified the computation to eliminate the division by 100 of the percent grade in the adjustment to critical gap in response to an HCQS clarification

RAMPS

  • Implemented a change Equation 4 in HCM Exhibit 25-5 for predicting V12 for 8-lane freeway on- ramps

CORSIM

  • One-touch animation updated to accommodate turn lanes in TWSC, three-leg roundabouts and better ramp accel/decel lane representation

SIGNALS

  • Corrected situation where the I-factor may have reverted to 1.0 when the upstream signal file was a T-intersection
  • Corrected the need for a File Save or loading all periods to activate some general data in multiple- period analysis files
  • Corrected missing two general information fields (Analysis Time Period and Analysis Year) in the formatted reports (text report was OK)
  • Changes were made in the code to match the current manual concepts for calculating permitted green time in certain protected-plus-permitted scenarios
  • CORSIM animation from HCS+ can now handle exclusive left-turn lanes adjacent to shared left-right lanes (no thru)
  • CORSIM animation from HCS+ can now explicitly model actuated signal controller operations

UNSIGNAL

  • Corrected situation for some TWSC data sets where the Hourly Flow Rates are shown incorrectly in the formatted report. All calculations remain valid
 ARTERIALS

  • Corrected restoration of the I-value for the first intersection in a saved file

TWOLANE

  • Implemented changes to HCM Exhibits 20-16, 20-20 and 20-21, primarily to include two-way flow rate rather than opposing demand flow rate in calculating of fnp

RAMPS

  • Implemented HCM changes to add a new variable (v3,v34) to check for maximum and imbalance, and may change v12 accordingly

FACILITIES

  • Implemented the HCM updated Ramps methodology and LOS F reporting updated for certain scenarios.

WEAVING

  • Corrected the reports for weaving intensity factors (unconstrained values may have been shown in constrained operation), but calculations were correct and not altered

  • CORSIM animation implemented in Signals, Unsignal, Freeways, Weaving and Ramps

SIGNALS

  • Optimization implemented for multiple period data sets
  • Additional error checking implemented for Preset Phasing
  • Updating issues in the Multiple Period Report resolved
  • Added Advice notice on the status bar
  • Added “Don’t show this again” option to the Advice dialog
  • Adjustments to the gu and gq values in permitted left-turn computations in Signals
  • Correction to d1 computations for some data sets with non-zero unmet demand

TWOLANE

  • Corrected flow rate used in implementing HCM Exhibit 20-20 for directional analyses

RAMPS

  • Corrected a report issue with the LOS F threshold before files were saved

FREEWAY FACILITIES

  • Some queue calculations in undersaturated conditions and v/c computations in oversaturated conditions were corrected

Release 5.1 (05/15/05) Initial Release