Iowa Study of No Passing Zone Signing, 1962

(1962) Iowa Study of No Passing Zone Signing, 1962. Transportation, Department of


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This report is compiled from data gathered by interviewing motorists to sample their opinion of Iowa's method of supplementing the yellow barrier line pavement marking of no passing zones on primary highways with yellow pennant shaped "No Passing Zone" signs mounted on the left shoulder of the highway. The effective designation of no passing zones is one form of control that can contribute to a reduction in the number of fatal high-speed head-on collisions resulting from passing in areas which do not afford sufficient sight distance of approaching traffic. It is the purpose of this report to present an evaluation of the Iowa "No Passing Zone" sign by individuals from all states who have traveled on Iowa's primary highways and who must obey the no passing zone restrictions and be warned by this sign of the presence of the zones. The "No Passing Zone" sign was formulated and approved by the Governor's Safety Committee a short time prior to the experimental erection of the signs. The Governor's Safety Committee adopted this sign as they felt that such a sign should be distinctive (not similar to any other type of sign) and easily visible to a driver attempting a passing maneuver.

Item Type: Departmental Report
Keywords: No passing zones, Signs, Traffic control, Traffic safety
Subjects: Transportation
Transportation > Roads and highways
Transportation > Traffic safety
Transportation > Law and policies
Transportation > Law and policies > Enforcement
ID Code: 21764
Deposited By: Iowa DOT Library
Deposited On: 04 Mar 2016 20:38
Last Modified: 04 Mar 2016 20:38