Publication Date: 1/1/74     Pages: 1     Date Entered: 2/22/84     Title: TRUCK IDENTIFICATION MARKINGS     January 1974     U.S. ATOMIC ENERGY COMMISSION     REGULATORY GUIDE     DIRECTORATE OF REGULATORY STANDARDS     REGULATORY GUIDE 5.17     TRUCK IDENTIFICATION MARKINGS A. INTRODUCTION     Paragraph 73.31(e) of 10 CFR Part 73, "Physical Protection of     Plants and Materials," requires that vehicles used to ship by road     quantities of special nuclear material identified in section 73.1(b)(2)     be marked on top with identifying letters or numbers which will permit     identification of the vehicles under daylight conditions from the air in     clear weather at 1,000 feet above ground level. This paragraph also     requires that the same code of letters and numbers be marked on the     sides and rear of the vehicle to permit identification from the ground.     This guide identifies methods acceptable to the Regulatory staff for     complying with the Commission's regulations with regard to markings     applied to a road vehicle to enhance its identification from the air. B. DISCUSSION     The Department of Transportation (DOT) has concluded a project to     determine the most useful sizes, shapes, location, and colors for     truck-top markings. This project was carried out by the DOT's     Transportation Systems Center, Cambridge, Massachusetts, with the     assistance of the New York City Police Department. The results of the     project have been published in a DOT report entitled "Truck-Top Markings     for Visual Identification,"(1) DOT P 5200.8, August 1973. Chapter IV of     this report presents guidelines for the appearance of truck-top markings     and for suitable materials. C. REGULATORY POSITION     The methods and materials recommended in Chapter IV of DOT     publication DOT 5200.8 "Truck-Top Markings for Visual Identification"(1)     are generally acceptable to the Regulatory staff for complying with the     Commission's regulation for marking vehicles so that they can be     identified from the air. Markings on the sides and rear of the vehicle     should be similar to those on the top except that the size of the     markings need not be the same.     ----------     (1) Copies may be obtained from the Superintendent of Documents,     U.S. Government Printing Office, Washington, D.C. 20402.     ----------     5