CHAPTER 142
SPEED ZONING ON PRIMARY HIGHWAYS
[Prior to 6/3/87, Transportation Department[820]—(06,K) Ch 7]
761—142.1(321) Adjustment of speed zones on primary highways. The purpose of this rule is to establish the procedure for processing requests to change posted speed limits on primary highways.
	142.1(1) Procedure.
	a. 	All requests for raising or lowering the posted speed limits on primary highways shall be made to the appropriate district office.
	b. 	The department will conduct an engineering and traffic investigation and, if the speed limit is found to be greater or less than is reasonable or safe under the conditions found to exist, the department will declare a reasonable and proper speed limit and post appropriate signs.
	c. 	The person or agency submitting the request for the engineering and traffic investigation shall be advised of the conclusions of the study and the action to be taken by the department.
	142.1(2) Information. Information regarding this rule is available from the Office of Traffic and Safety, Iowa Department of Transportation, 800 Lincoln Way, Ames, Iowa 50010.
This rule is intended to implement Iowa Code sections 321.285 and 321.290.
[Filed 7/1/75]
[Filed 5/11/87, Notice 3/11/87—published 6/3/87, effective 7/8/87]
[Filed 10/10/02, Notice 8/7/02—published 10/30/02, effective 12/4/02]