http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Use of flashing yellow operations to improve safety at signals with protected-permissive left turn (PPLT) operations
Development of left-turn operations guidelines at signalized intersections
Research and Technology Implementation Office.
xi, 147 pages : color illustrations ; 28 cm.
Performed in cooperation with Texas Dept. of Transportation and Federal Highway Administration for Texas Dept. of Transportation Research and Technology Implementation Office 0-6568
Research report (Austin, Tex.) ; 0-6568-1