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Positive Guidance is the placement of traffic control devices to maximize the probability of drivers selecting appropriate speeds and paths. This important 1975 document defines driver performance, information primacy, driver expectancy, information handling, hazard detection, and system failure. Photocopy. Book, traffic engineering expert Book , 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