Guidelines for Prioritization of Future Active Traffic Management Deployment

This project tested the prototype software and procedures being developed in conjunction with the SHRP2 (Second Strategic Highway Research Program) L08 project, called FREEVAL-ATDM, for estimating the benefits of improved operations to freeway reliability. That software, a version of the FREEVAL software, computes performance metrics by using algorithms from the 2010 Highway Capacity Manual and new software tools. This report describes the outcome of tests of the use of that software to estimate performance of I-5 in two locations: 1) northbound through Joint Base Ft. Lewis/McChord (JBLM) and 2) northbound approaching downtown Seattle starting just south of the I-405 interchange in Tukwila. The summary conclusions from these tests are that the model can produce the useful outputs for which it was intended, but it tends to under-estimate the travel times and delays actually experienced on the roadway, and it likely needs some additional calibration.
Publication Date: 
Wednesday, January 1, 2014
Publication Number: 
WA-RD 808.1
Last modified: 
10/12/2016 - 15:41
Mark E. Hallenbeck, Duane Wright, John M. Ishimaru.
Washington State Transportation Center (TRAC-UW)
Number of Pages: 
Software, Prototype tests, Freeway operations, Data collection, Traffic models, Forecasting, Travel demand management, Performance, Evaluation and assessment.