TRAFFIC OPERATIONSCHAPTER 130SIGNING MANUAL[Prior to 6/3/87, Transportation Department[820]—(06,K) Ch 2]761—130.1(321)  Manual.  The “Manual on Uniform Traffic Control Devices” (MUTCD), 2009 Edition with Revision Numbers 1 and 2, dated May 2012, published by the U.S. Department of Transportation, Federal Highway Administration, shall constitute the manual and specifications for a uniform system of traffic control devices for use upon the highways of this state.  130.1(1)  The department makes the following exception to the MUTCD for school zones: In Part 2, Section 2B.04, paragraph 12, of the MUTCD, Right-of-Way at Intersections, Standard, in lieu of the sentence “Portable or part-time STOP or YIELD signs shall not be used except for emergency and temporary traffic control zone purposes,” the department adopts the following: “Portable or part-time STOP signs may be used only in the following situations:“1.When necessary for emergency and temporary traffic control zone purposes, or“2.In school zones at appropriate school crosswalks.”  130.1(2)  Copies of the MUTCD are available for examination at the Office of Traffic and Safety, Iowa Department of Transportation, 800 Lincoln Way, Ames, Iowa 50010. The MUTCD is also available on the Internet at http://mutcd.fhwa.dot.gov.This rule is intended to implement Iowa Code sections 321.249 and 321.252.Related ARC(s): 9362B, 1986CRelated ARC(s): 9362B, 1986C