Abstract
Studies were conducted at a major maintenance zone on a rural Interstate highway in Texas to evaluate the use of Highway Advisory Radio (HAR) for work zone traffic management. The studies revealed that the HAR had little or no impact on work zone traffic operations because of two factors First, the conventional signing at the work zone was excellent and the HAR functioned only as a supplemental information source. Secondly the advanced signing used to encourage motorists to tune to the HAR was inadequate in terms of legibility and visibility.