10701 EVERGREEN WAY 2018-01-01 MF Import

� Terra Firma ^ �P� Noordin & Sayani Site Traffic impact Analysis Page -3- December 14, 1988 volumes due to the proposed Walden Pond, Covington Farms, and William Tsao b Associates (295 unit) aparkment projects. The proposed Tsao apartment project is to be located on the west side of Evergreen Way across from this proposed warehouse project. DRIVEWAY TRAFFIC OPERATIONS The existing two way left turn lane in the center of Evergreen Way will allow the proposed driveway to function acceptably. The existinq two way left turn lane extends well beyond the proposed driveway location in both directions. Left turn traffic will be able to safely wait in the lane to turn into the driveway, Left turns from the site will be able to turn into the two-way left turn lane, then merqe into the southbound traffic stream, This two part maneuver facilitates left turns by allowing left turninq motorists to use gaps in only one direction of highway traffic at a time. The existinq two way left turn lane is under-utilized due to the vacant land presently existing along this section of Everqreen Way. Left turning traffic at the proposed driveway will allow the two way left turn lane to serve the purpose for which it is intended. The left turn traffic movement exitinq the driveway is the traffic movement which will experience the worst level of service. During the 1990 AM peak hour, both the left turn into the two way left turn lane and the merge into the southbound through traffic will operate at LOS C. For the 1990 PM peak hour the calculated LOS for the left turn into the two way left turn lane is LOS E, and for the merge into the southbound throuqh lane it is LOS D. These levels of service are acceptable for a low to moderate volume driveway during the peak hours. The 1985 Hiqhway Capacity Manual methodology used for the LOS calculations does not considez the effect of traffic signals, which may create longer qaps i� the major street traffic stream. The existinq signals on SR 99 at 112th St. S.W. und at Everett Mall Way create gaps which may provide for somewhat better operation than the LOS calculation would indicate. The LOS calculation computer printouts are attached. DRIVEWAY DESIGN RECOMMENDATIONS 1 . If possible, the proposed driveway should be realigned to interaect Fverqreen Way at an angle of at least BO degrees, and preferably 90 degrees. This will facilitate turns to and from the north, particularly large trucks turning rigtit