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WSDOT has approximately 1,500 positions for winter operations, which includes snow plow crews for the major mountain passes crossed by state highways. [31] In the Snoqualmie Pass area, the agency has avalanche control crews that use an M60 tank, howitzers, and a mechanical tram carrying explosives to clear snow buildup before it endangers the ...
Citation template for state highway logs from the Washington State Department of Transportation Template parameters [Edit template data] Parameter Description Type Status year year the year of publication String required page page pages the page or pages of the log being cited Number optional access-date access-date date the log was accessed Date optional link link set to link the publisher ...
Special care should be taken in depressed highways, where piers and walls should be placed at least 2 feet (0.61 m) beyond the outer edge of either shoulder. Slopes in the clear zone should be at most 1:4, and should typically be 1:6. Curbs: No curb is to be placed nearer to the roadway than the outside edge of the paved shoulder. Any curb is ...
Sep. 5—This morning, state and local agencies began sweeping Blakeslee Junction, an encampment of about 25 people between Interstate 5 and a three-way railroad crossing at the end of Eckerson ...
[84] [85] On July 27, WSDOT will start to fix an unstable slope north of Blewett Pass, 8 miles (13 km) south of the US 2 intersection. [86] [87] Another project set to begin on July 27 to fix an unstable slope on US 97 near Blewett Pass. [88] [89] WSDOT will add a passing lane on the highway at Blewett Pass in summer 2010.
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An important concept in understanding roadway departure is the clear zone. This is the roadside area that is free of obstacles and dangerous slopes. Early research at the General Motors Proving Grounds found that 80% of their test drivers stopped or regained vehicle control within 30 feet (9 m) of the edge of the travel lane.