The proposed speed zoning statute will overcome the failings and limitations evidenced by current state laws and practices. It provides a scientific basis to establish a uniform and flexible system of speed zoning that will result in safe, reasonable and relevant speed limits.

The following information comes entirely from a Washington State Department of Transportation pamphlet on speed zoning.

Studies on setting speed limits

Articles from the NMA and other sources on speed limits

It should be noted that this report from the 4M-25 Committee on Speed Zoning, a part of the Institute of Transportation Engineers, is a draft version and is not yet an official ITE recommendation.

Maximum speed limits on Interstate and Other Primary Roads

This is a list of links to state Department of Transportation pages explaining their speed zoning policies