Authors:  Robert J. Ruden, Albert Burg, John P. McGuire

Date of Publication:  July 1982

Sponsoring Agency:  U.S. Department of Transportation - Federal Highway Administration, Office of Research, Traffic Systems Division

Performing Organization:  JGM Associates, Inc.

Report No:  FHWA/RD-80/003

Abstract:

The objectives of this research were to design, develop and test prototype activated advance warning devices (AAWD's) for use in advance of rail-highway crossings with flashing lights or flashing lights and automatic gates and associated train detection circuitry.  Other objectives were to establish guidelines for using such devices and to identify the types of crossings where activated advance warning would be most effective.

A literature review and survey of existing AAWD installations led to the development of four candidate device, all consisting of a primary symbol warning sign, a supplemental message sign and a pair of yellow flashing lights activated by the approach of a train.  Indoor laboratory film tests were conducted which focused on subject understanding of the sign components of the devices.  Approximately 300 licensed and soon-to-be licensed drivers took part in the tests, which revealed that an RXR symbol and directional arrow within a diamond sign present a readily understood message, particularly effective when the crossing lies in or beyond a curve ahead.  Limited outdoor tests of full-scale devices verified the indoor test results.

Three of the four candidate AAWDs were field tested, with dya and night evaluation of vehicle speeds, braking location and driver looking behavior.  All three devices proved effective in alerting and preparing the driver for at-crossing signal activation.  One of the tested devices is recommended for deployment and guidelines are given for its location, placement and operation.  Additional research to supplement the present findings is also recommended.
 

No. of Pages:  196