Samenvatting
Officials responsible for the design, construction, maintenance, and traffic control of the nation's highways are continually faced with the problem of devising effective techniques for alerting drivers to the dangers that lie ahead. These dangers may take many forms and, correspondingly, a considerable variety of warning techniques may be appropriate. This report is concerned with only one of these dangers, the highway-rail grade crossing, and with certain human factor considerations in developing appropriate measures for warning the driver who is in proximity to such a crossing.