Pratt, Michael P.; Songchitruksa, Praprut & Bonneson, James A. Development of guidelines for pedestrian safety treatments at signalized intersections, report, August 2011; (https://texashistory.unt.edu/ark:/67531/metapth326632/m1/1/: accessed May 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .

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