Citation

Corbett M. APWA Reporter 2007; 74(9): 94-96.

Copyright

(Copyright © 2007, American Public Works Association)

DOI

unavailable

PMID

unavailable

Abstract

This article examines methods for transportation officials to efficiently communicate with motorists. The methods that are free to motorists are AM/FM radio, static road signs, and variable message signs. The advantage that AM/FM radio has over road signs is that important information can be repeated. In 1977, the Federal Communications Commission passed the 90.242 regulation which enabled government entities, parks and authorities to hold a license for AM radio stations, also known as Highway Advisory Radios (HARs), Traveler Information Systems (TIS), or Emergency Warning Systems. These low-power 10-watt stations form an emergency communication channel allowing transportation officials to alert drivers of congested areas, potential alternative routes, or weather situations. Today these systems have been enhanced to include features such as Text-to-Speech and Global Positioning System (GPS) synchronization, which has increased the range of HAR array and improved audio quality.