External Link: http://www.spcregion.org/trans_cong_pm.shtml
Year Published: 2016
Publisher: Southwestern Pennsylvania Commission

This webpage explains the performance measures the Southwestern Pennsylvania Commission uses to gauge congestion. The measures they use are Posted Speed Reliability Index, Expected Travel Time Reliability Index travel time, speed, and delay as its fundamental performance measures. They then use those basic measures to calculate additional performance measures such as Delay per Vehicle per Mile and Total Delay.

Related Components: Component 5: Monitoring and Adjustment
Related TPM Areas: General