Institute of Transportation, MOTC

       The “Taiwan Highway Capacity Manual” was published by the IOT in 1990 with revisions in 2001, 2011 and 2022. In order to improve the convenience of highway capacity analysis, the "Taiwan Highway Capacity Analysis Software (THCS)" was developed in conjunction with the "2011 Taiwan Highway Capacity Manual" since the 1900s, and gradually revised or updated some sub-software of THCS according to the revision results of the highway capacity manual. With these tools, analysts can not only perform accurate numerical computations but also understand operations and deliver results in a short period of time. This is beneficial to road planning and design, and facilitates the formulation of road operation strategies. The THCS software is now widely used in numerous highway capacity and service standard assessments such as urban renewal planning, traffic impact assessments and newly built roads (such as adding and improving highway interchanges). In order to improve the usability, user-friendliness, and scope of THCS and disseminate recent highway capacity research, this project aims to introduce several enhancements. In addition to incorporating the recent research outcomes into THCS, we add a sub-module for analyzing freeway merging area for on-ramp, update the simulation module for freeway basic segments, revise the software user manual, maintain the webpage, provide educational training, engage experts for consultation services, and create posters to show significant achievements.