Switzerland expands flexible speed limits

The Swiss department for roads, Astra, is to expand its flexible speed limit systems. It already runs flexible speed limits on the approach to the Baregg tunnel and on the Zurich western bypass, but it is planning to expand this to include whole routes, such as the motorway between Zurich and Bern or Geneva and Lausanne.
June 19, 2013 Read time: 1 min

The Swiss department for roads, Astra, is to expand its flexible speed limit systems. It already runs flexible speed limits on the approach to the Baregg tunnel and on the Zurich western bypass, but it is planning to expand this to include whole routes, such as the motorway between Zurich and Bern or Geneva and Lausanne.

The system uses sensors which measure the volume of traffic, and if the number of cars reaches a certain level, the system can either lower the speed limit itself automatically or alert a traffic control centre.

Astra emphasised that it was important that this took place before the volume of traffic leads to a traffic jam. The capacity of the roads is the greatest when cars travel at a constant speed of 85 km/h. Astra is also using other congestion reduction measures, such as using the hard shoulder as an additional lane, and banning lorries from overtaking in certain areas.

Urban Traffic Control

Related Content

  • Automating enforcement of environmental zones
    July 27, 2012
    Amsterdam City Council has chosen to move away from manual enforcement of its environmental zone, which is intended to keep highly polluting goods vehicles out of the city centre, and is installing an automated, ANPR-based system. The signs are not much to look at: white with a red circle and the all-important word Milieuzone ('Environmental zone'). But these signs mean that Amsterdam's city centre is strictly off-limits to polluting goods traffic. At the moment compliance is monitored by special wardens wh
    Read More
  • Smart motorways make sense, says FTA
    September 4, 2015
    The implementation of smart motorways in Northern Ireland would make economic, environmental and safety sense, according to the Freight Transport Association (FTA) today. Responding to a study commissioned by the roads authority, TransportNI, which outlines the proposal of the M1 and M2 in and out of Belfast becoming smart motorways, FTA stated that freight operators would see benefits in the introduction, economically, environmentally and would improve safety on the routes.
    Read More
  • Germany's approach to adaptive traffic control
    February 3, 2012
    Jürgen Mück, Siemens AG, describes the three-level approach taken in Germany to adaptive network control
    Read More
  • Temporary CCTV poses more challenges than permanent installations
    June 12, 2015
    Long-term roadworks pose particular problems for temporary surveillance installations. Converting the hard shoulder to a running lane, either full- or part-time, is the UK Highways Agency’s solution to ease motorway congestion. This is leading to a number of long-term projects where large stretches of the hard shoulder are closed off by temporary concrete barriers and during these roadwork programmes, temporary CCTV cameras are deployed to monitor and record vehicle traffic and workers.
    Read More

Highlighted Content