Abstract
Intelligent transport systems have a huge importance during adverse weather conditions. These systems call the drivers’ attention to possible dangers by the use of variable message signs installed along the motorways. Several researchers have dealt with the connection of weather and traffic safety in the last decades, but they have not investigated the effects of weather related messages. This paper examines the impact of weather-related warning messages on traffic in adverse weather circumstances on the Hungarian motorways. Three independent databases were analyzed in order to compare the speed-reducing effect of specific signs during different weather events and precipitate intensities.
Highlights
Studies that deal with the effects of weather activities on traffic flow became more intensive from the ‘70s
Several researchers have dealt with the connection of weather and traffic safety in the last decades, but they have not investigated the effects of weather related messages
The weather event triggers a speed decrease, which depends on the intensity of the event
Summary
Studies that deal with the effects of weather activities on traffic flow became more intensive from the ‘70s. The wide spread of intelligent transportation systems and services (ITSS), road weather information systems (RWIS) and the use of variable message signs have given new impulse to the research conducted in the 90’s. While the primary goals of ITS-S solutions are the increase of traffic safety and traffic efficiency, until the RWIS systems provide information about the actual weather and road conditions for the road operators and the drivers. One unique ITS system is the vehicle activated signs – VAS – installed on spots with increased event potential (dangerous curves, near schools, etc.). VAS solutions warn the drivers and force them to reduce their speed and change their driving behaviour. VAS systems can be used independently or connected to other traffic management and monitoring systems
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