20211215134200.0 Synthesis of highway practice 0547-5570 0547-5570 Synthesis of highway practice. Synthesis of highway practice District of Columbia 0547-5570 Synthesis of highway practice. 0547-5570 0547-5570 http://bibpurl.oclc.org/web/43468 http://www.trb.org/Publications/PubsNCHRPSynthesisReports.aspx