Abstract
Drivers verbal responses and involuntary deceleration's to eleven different red highway reflector configurations presented in 16 mm animated films in the UCLA Driving Simulation Laboratory showed that A) there i an urgent need for a continuing educational program via mass media so that the public is made aware of the existence of the red reflectors and their intended meaning; b) that the regular pattern now being used throughout the State of California is the least effective to unknowledgable drivers; and C) that an irregular configuration which is not continuously repeated elicits the most responses from unknowledgable drivers.