This study evaluated a queue warning system (QWS) installed throughout the construction work zone (between mile markers 161 and 181) on U.S. Highway I-25. The QWS was evaluated during September and December 2019 for how well it mitigated sudden vehicle or traffic stops. The average vehicle speed and the average speed reduction during the system activation period were used as measures of effectiveness (MOEs).
(Our website has many links to other organizations. While we offer these electronic linkages for your convenience in accessing transportation-related information, please be aware that when you exit our website, the privacy and accessibility policies stated on our website may not be the same as that on other websites.)