If Not Speeding, What Should The Enforcement Focus Be? 

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Thomas C. Schelling. Micromotives and Macrobehavoir, New York: W.W. Norton, 1978, p.128.
"... the crucial element is often coordination. People need to do the right things at the right time in relation to what others are doing."

Charles A. Lave. "Speeding, Coordination, and the 55 MPH Limit." The American Economic Review, 75.5 (1985 December), p. 1159.
"For peculiar historical reasons, speed laws evolved as limits on driver behavior, rather as signaling devices meant to coordinate it. Guided by the limit-rationale, police concentrate on those drivers who exceed the legal speed, and tend to ignore those driver who disrupt coordination by traveling much slower than the norm."

Martin R. Parker. "Comparison of Speed Zoning Procedures and their Effectiveness: Final Report." Michigan Department of Transportation - Traffic and Safety Division, 1992 September, p. ix.
"The accident analysis revealed that the speed limit changes on Michigan roadways produced a small effect on total accidents, and these effects varied from location to location. Consequently, speed zoning should not be used as the only corrective measure at high-accident locations in lieu of other safety improvements."

Rev: 1998.09.29