HCS Version History

HIGHWAY CAPACITY SOFTWARE

STREETS

TWSC

ROUNDABOUTS

MUTCD WARRANTS

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

HSS Version History

Implements user-defined crash modification factors (CMFs)
Adds map-based segmentation for rural and urban facilities
Adds procedure for High-Speed Urban Intersections (NCHRP 17-68)
Adds procedure for Ramp Terminals at Single-Point Diamond Interchanges (NCHRP 17-68)
Adds procedure for Ramp Terminals at Tight Diamond Interchanges (NCHRP 17-68)
Computes and displays crashes as a ratio of vehicle miles traveled (VMT) in reports for segment analyses
Computes and displays crashes as a ratio of million entering vehicles in reports for intersection analyses
Adds diagrams for each Ramp Terminal type
Shows predicted PDO crashes for Multilane 3SG intersection
Fixes crash when opening Details page
Fixes crash when loading ramp segments
Fixes incorrect collision distribution calculations for One-Way, All-Way, and Six or More Lanes Urban sections
Triggers warning of incorrect sum of proportions when changing intersection type
Triggers warning when number of cross section lanes is 2 for rural ramp segment
Fixes HSS not converting HCS Highways “Area Type” input correctly
Includes other minor bug fixes and improvements

Adds ETFOMM simulation as an alternative modeling tool to CORSIM
Adds a new “Add Roundabout” tool to Map View that supports both CORSIM and ETFOMM
Adds a new simulation window for ETFOMM and CORSIM
Adds traffic assignment for street-level analysis
Adds a dedicated console for viewing in-progress messages of ETFOMM and CORSIM
Adds a new option to simulate different random seeds every simulation run
Adds automatic sorting of record types by node number in the .trf file
Improves automatic turning movement assignment
Fixes a crash that occurs when using multiple time periods for freeway analysis
Fixes a crash that occurs when creating links larger than 10,000 ft
Fixes a crash that occurs when changing the number of lanes on a link
Fixes several multi-run issues, including generating a multi-run configuration file
Includes other bug fixes and improvements