Across much of the Netherlands there are variable message displays across many motorways. These displays are used to present messages or information, e.g. about road works. The Road Works Warning service means that in future drivers in the Netherlands will see the same information displayed in their car, via a WiFi-P link. Road works warnings are also useful on roads without variable message displays. However, along those roads there are fewer roadside installations (such as display portals) available where permanent beacons could be installed.
Suitable for regional and local roads
For this reason Rijkswaterstaat and suppliers are specifying, developing and testing a mobile system. A central system aggregates road works information from a range of information systems and converts this to DENM-messages. The messages are then transmitted to passing vehicles by a WiFi beacon on a lane closure trailer, which can be deployed quickly. This solution is similar to that used in the corresponding German project. It is likely that in future it could also be used along provincial and municipal roads. Hence, it would be possible to provide the Road Works Warning service to road users throughout the Netherlands.
There were temporary traffic management measures in force during the road works on the A16 between Rotterdam and Dordrecht. During the test period three test vehicles made numerous passes along the road works site. In-vehicle displays accurately indicated the location of the road works and temporary changes to the lane layout. The short range communications between the beacon and the test vehicles worked effectively. The test focussed on the range of the beacon and correct reception of the DENM message by the On Board Units in the test vehicles. This was also the first time that messages about the road works were automatically generated by a central unit, based on information from several sources.
Participants in the test:
- Rijkswaterstaat (management and development)
- Compass Infrastructuur, Rotterdam
- Swarco, Lijnden
- Beijer Automotive
- EBO van Weel
- Vermeulen Groep, Verkeerstechniek