This report contains tabular information concerning the attributes of U.S. Highways. The information is divided into three sections: (1) road characteristics, (2) road markings, and (3) intersections.
The first section (road characteristics) describes the road-type classification scheme used in the U.S. It also includes a state-by-state statistical summary of road miles by lane width and the number of traffic lanes.
The second section (road markings) enumerates regulations for lane separations, road-edge markings, curb markings and delineators. It also contains information concerning the retroreflectivity of the materials used for these road markings.
The third section (intersections) includes statistical information from three states about intersection configuration, control, and marking.
The information concerning markings, regulations, and road-type classification was extracted primarily from part 3 of the Manual on Uniform Traffic Control Devices (MUTCD) and A Policy on Geometric Design of Highways and Streets (AASHTO Green Book). Statistical information was obtained from several state departments of transportation and several Web sites linked to the U.S. Department of Transportation. An extensive listing of sources and URLs is provided within the document.
|Graphical Abstract (.pdf)|||||UMTRI-98-34 Full Report (.pdf)|
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