Results are described of experiments conducted in Mississippi, California, and Oregon testing the effectiveness of speed control signs in rural school zones and small communities on high-speed, two-lane highways. Signs tested included existing signing, a reduced speed ahead sign, speed limit and reduced speed ahead signs coupled with hazard identification beacons, and a speed violation sign activated when a driver exceeded the speed limit in effect. Also, roadside interviews were conducted at the sites and a questionnaire booklet was administered to groups to assist in determining the ability of each of the signs to increase safety and improve driver awareness of potential hazards. The questionnaire booklet provided information on public reaction and understanding of the signs. Results indicated that the combination of signs and hazard identification beacons and the speed violation sign provided the most substantial improvement in reducing speeds and increasing awareness of roadside conditions for both small communities and school zones.
Abstract