SH 119 Adaptive Traffic Signals

sh-119-adaptive-construction-travel-time-runStolfus assisted CDOT Region 4 to deploy and evaluate an adaptive traffic signal system along SH 119 near Longmont, Colorado. The adaptive system encompasses a total of eight signals, including the I-25 / SH 119 ramp terminals. In addition to providing Systems Engineering Analysis (SEA) and signal design services for the project, Stolfus and All Traffic Data conducted a comprehensive data collection program to evaluate before/after conditions as well as the effectiveness of an adaptive traffic signal system during construction (the corridor was reconstructed and traffic was in a head-to-head configuration on one side of the divided highway during construction). Design of the project was completed in 2015 and the adaptive signal system has been deployed. Stolfus is currently preparing an evaluation of the adaptive system.

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