AgdaPkt 2003-04-14 - Laserfiche WebLink

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MEMORANDUM COMMUNITY DEVELOPMENT SERVICES ENGINEERING AND CONSTRUCTION TO: Bruce Liedstrand, CDS Director DATE: April 3, 2003 FROM: Rich Haygood, Traffic Engineer RE: Parking Garage Revision for Retail /Cinema Project Traffic Signal Would Be Required at Winslow/Theatre Way /Garage Driveway Intersection • Estimated cost = $175,000 ($150,000 if Theatre Way is one -way toward Broadway) • Signal not required at Winslow/Theatre if no driveway and Theatre Way is one -way toward Broadway. Requires Continuous Left -Turn Median Lane on Middlefield (Jefferson to Winslow) • Revised driveway location would increase traffic volume on Middlefield between Jefferson and Winslow/Theatre Way (vs. Jefferson driveway), especially left turns at Jefferson and at the revised driveway location. • Michael Freedman proposal suggests Middlefield with only two traffic lanes and parking on both sides, eliminating the left -turn median lane. Higher Traffic Volume on Theatre Way (vs. Jefferson driveway) • For revised driveway location, the most direct route to /from the north and Veterans Blvd. is Theatre Way /Middlefield. A traffic signal at Middlefield/Veterans is already a required project mitigation. • Higher relative traffic volume on Theatre Way even if it's one -way (either direction). Revised Garage Driveway Safety • Exit emerges from a "hole in the ground" to intersect Middlefield/Theatre Way. • Although a grade- separated pedestrian path around the driveway is indicated, some pedestrians and nearly all bicycles will take a direct path across the driveway. • Exiting traffic reaches the driveway immediately after a sharp turn, which limits visibility. • The drawing indicates a 16% ramp slope, but does not indicate where that slope ends in relation to the driveway. The ramp slope also limits visibility of exiting traffic. (City standards allow up to 20% driveway slope, but for a visual point -of- reference, the slope _ of Jefferson at the Caltrain underpass is 7.5 %.) • Queuing of exiting vehicles on this curved and sloped ramp, and the traffic flow characteristics with this driveway signalized, would require further study.