Agenda Packets - 1997/04/28 - Laserfiche WebLink

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CONCLUSIONS The following conclusions are presented based on results of the study: 1. Over half the trips to the gas station use, during the most critical periods of the day (the AM and PM peak hours), will not be new trips attracted to Highway 10 or the surrounding streets. Instead, the majority of trips to the gas station during these periods of the day will be trips that are already on Highway 10 and nearby streets. 2. The two major intersections of concern are at Highway 10/Silver Lake Road and Driveway D/Silver Lake Road. The capacity analysis showed that both these intersections will operate at acceptable Levels of Service during the PM peak hour, the period of the day when traffic is most congested. The Highway 10/Silver Lake Road intersection will operate at LOS C, and the Driveway D/Silver Lake Road intersection will operate at LOS A. 3. On-site circulation provided by the loop road, assists in minimizing impacts that could result from the interface of traffic on the adjacent streets and site-generated traffic. 4. Analysis showed that a minimum of 225 feet would be desirable for northbound vehicle queuing at the Highway 10/Silver Lake Road intersection. The placement of Driveway D in alignment with an existing access drive on the west side of Silver Lake Road, allows 170 feet of stacking for vehicles on the northbound approach. While the minimum distance for stacked vehicles is not met, safe operations and unrestricted flow 40 should still be provided for the following reasons: • The intersection will operate at LOS C, with an average intersection delay of 15.2 seconds. The northbound movements will experience overall LOS D with only a 28.1 second approach delay. . • When possible it is good policy to align driveways to prevent dog-leg turning movements. • All turning movements at Driveway D, an unsignalized intersection, will operate at LOS A. At 170 feet south of the Highway 10 curb return, adequate stacking distance is provided to prevent southbound vehicles at Driveway D from backing up to Highway 10. • The distance between Driveway D and Driveway E is 100 feet. It is likely that northbound drivers will leave Driveway D open and stack between Driveways D and E. Combined, the available space for stacking is 270 feet. • • Driveway E provides access to an internal loop street, which serves the corner gas station use and others. If Driveway D is blocked by queued, northbound vehicles, Driveway E will be available for ingress and egress. 410 -18-