-transcad V4.5- 15 Apr 2026

1. The Era (Late 1990s) TransCAD 4.5 was released by Caliper Corporation around 1998–1999 . At the time, transportation modeling was dominated by mainframe-based or DOS-era tools (e.g., MINUTP, TRANPLAN). TransCAD was a pioneer: the first GIS designed specifically for transportation analysis on Windows 95/NT .