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This 1983 research conducted for the Federal Highway Administration demonstrates the criticality of crossover crown and cross slope in passing manuevers on two-lane highways. The report recommends a maximum cross slope of 2% on high-speed highways where passing is permitted. highway curve expert, roadway curve expert, hydroplaning expert, books,pavement edge drop expert, pavement edge drop off expert, work zone safety expert, construction zone safety expert, roadway hydroplaning expert, traffic engineering expert, traffic sign expert, traffic signal expert, pavement marking expert, highway safety expert