15 - Laserfiche WebLink

II / qA 9. , '1 ..�� 408 712.E v. .�6C2 _ ti r, .. •3 454 L . •5 `•o. - i 3 3 • r+ r S . n '-----1 .� { \ - h f r to P. '/ •. � i �, • [1 . =!, -',. la tato 1 li N„. _ . „ Y '''' /0; 'h Hexagon Transportation surveyed the eastbound queues on Owens Drive at the Iron Horse Trail Crossing during the PM peak period between 4:30 PM and 6:00 PM. Vehicle queues were measured every traffic signal cycle. Based on the survey, the average queue length during the peak 60 minutes was approximately eight vehicles. It is noted that for one or two minutes during the peak, the vehicle queue spiked to 21 vehicles, but these vehicles were all able to clear the intersection in a single cycle. The Hexagon field observations are similar to the data presented by staff in March of 2017. Alternatives Analyzed The potential improvements included: • Widening Project: Reconstruction of Owens Drive to add a second eastbound lane between Willow and the Iron Horse Trail (this would be completed by shifting the median to the north and removing one of the two existing left turn lanes). • Alternative 1: Create and deploy a traffic signal coordination plan for the PM peak hour that will focus on vehicle progression. • Alternative 2: Alternative 1 plus a reconstruction of the Iron Horse Trail curb ramps to reduce pedestrian crossing distance. • Alternative 3: Alternative 1 plus a reconstruction of the Iron Horse Trail crossing to return the crossing to its previous single stage crossing design. Each of these potential improvements have benefits and drawbacks. The existing corridor delay (the time stopped or slowing down on the corridor - baseline delay) measured by Hexagon was 134.8 seconds, which means that the average vehicle experiences slightly more than two minutes of stopped delay for eastbound travel (from the time the car leaves the Owens at Chabot intersection to the time the car leaves the Owens and Hacienda intersection). Widening Owens (Reconstruction) The Widening Project (second eastbound travel lane) showed the greatest travel time savings, with a 22 second reduction, down from 134 seconds of corridor delay to 112 Page 5 of 8