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Memorandum To: Streets and Utilities Committee Members From: Design Team Date:9/4/08 Re: Laport Drive and Edgewood Drive Intersection (Non-Standard) File No.: 435-08132-0 This memo is intended to inform the Streets and Utilities Committee about the design of the intersection of Laport Drive and Edgewood Drive within the 2009-2010 Street and Utility Improvement Project. Below is a summary of the existing conditions followed by the proposed design and the reasoning behind the deviation from the existing layout. The existing intersection is a non-standard intersection in the sense the streets do not intersect at close to 90 degree angles to each other. This layout decreases the safety for vehicles and pedestrians traveling through the intersection because it is tough to tell which movements have the right of way. To help control which movements have the right of way, the intersection has a stop sign for westbound Laport Drive. Area residents have told us that few vehicles pay attention to the stop sign. Most tend to roll through it without stopping. We believe this is partly due to the fact that there is only one residence to the north of Laport Drive on Edgewood Drive and partly due to the low traffic levels in this small residential area. Generally Edgewood Drive exists as the through street and Laport Drive “tees” into it. The existing conditions are shown on the attached Figure 1. The proposed layout of the intersection of Laport Drive and Edgewood Drive is shown on the attached Figure 2. The intent is to make the movement from the southern leg of Edgewood Drive to Laport Drive as the major or through movement. The north leg of Edgewood Drive would “tee” into Laport Drive. The existing stop sign would be moved from westbound Laport Drive to southbound Edgewood Drive. We discussed with City staff and came to the conclusion this would be the best design of the intersection. Staff would have liked to see a more traditional 90 degree intersection if Laport Drive would be extended to the west of Edgewood Drive. Laport Drive is likely to be extended to the west when the parcel to the northwest of Laport Drive and Edgewood Drive develops. City staff believed the odds of that parcel developing within the next 5 years was low. Therefore rather than attempt to coordinate the intersection for a possible extension of Laport Drive to the west, the best design for the intersection as it exists today was sought after. The location where the north leg of Edgewood Drive would “tee” into Laport Drive was picked for a few reasons. The first was due to the house at the SE corner of Laport Drive and Edgewood Drive. With the proposed layout, headlights from a southbound vehicle on Edgewood Drive would not shine directly into