Examples of typical turning templates would include a WB-40, WB-50, or in rare instances, particularly on Industrial Access streets, a WB-67 (AASHTO Policy on Geometric Design) however, this list is not exhaustive and designers should be prepared to work with other templates that may be provided by the City of Seattle or other sources such as transit agencies. On Industrial Access streets, Urban Center Connector streets, major and minor truck streets or other locations where SDOT would anticipate a larger vehicle using a site, a radius evaluation based on a larger vehicle would be required. Designers should use this vehicle when using Auto Turn for intersection analysis.
Design vehicle: SDOT’s standard design vehicle is SU-30 with a 42 foot turning radius.
