Transcription of Chapter 1270 Auxiliary Lanes
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WSDOT design manual M Page 1270-1 July 2017 Chapter 1270 Auxiliary Lanes General Climbing Lanes Passing Lanes Slow-Moving Vehicle Turnouts Shoulder Driving for Slow Vehicles Emergency Escape Ramps Chain-Up and Chain-Off Areas Documentation References General Auxiliary Lanes are used to comply with capacity demand; maintain lane balance; accommodate speed change, weaving, and maneuvering for entering and exiting traffic; and encourage carpools, vanpools, and the use of transit. For signing and delineation of Auxiliary Lanes , see the Standard Plans, the Traffic manual , and the MUTCD. Contact the region Traffic Engineer for guidance. Although slow-vehicle turnouts, shoulder driving for slow vehicles, and chain-up areas are not Auxiliary Lanes , they are covered in this Chapter because they perform a similar function.
Auxiliary Lanes Chapter 1270 Page 1270-2 WSDOT Design Manual M 22-01.14 July 2017 The maximum entrance speed, shown in the graphs, is 60 mph.
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