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

  • Flir expands Marseille’s tunnel vision
    November 12, 2014
    Marseille’s city authority has added the monitoring of a second tunnel to the existing network with a new approach towards video management. Measuring 1.5km in length, the double-deck Prado Sud tunnel extends Marseille’s existing 2.5km Prado Carénage tunnel towards the southern part of the city. While it was logical to use a common control room and to use the latest detection and monitoring systems in the new tunnel, it was deemed too disruptive and costly to completely upgrade the existing tunnel.
    Read More
  • The benefits of combining enforcement and traffic management
    February 27, 2013
    Jason Barnes considers how combining enforcement equipment with other traffic management technologies might benefit our future – if only the will were really in place to do so. During the ITS World Congress in Vienna in October last year, Navtech Radar and Vysion­ics ITS announced a strategic partnership that would combine the expertise of Navtech in millimetre-wave wide-area surveillance technology with Vysionics’ machine vision-based automatic number plate recognition (ANPR) and average speed measurement
    Read More
  • Lindsay zips-up lane closure solution
    May 11, 2017
    Moveable barrier systems are offering engineers a new traffic management options. Work zones - be they for maintenance or road widening - are a fact of life and when they occur on major highways, they create no end of problems for traffic planners and travellers alike.
    Read More
  • Missouri’s smart solution for rural road monitoring
    July 7, 2017
    David Crawford sees how Missouri is using commercially available information to rapidly improve monitoring and driver information on rural highways. Missouri is a predominantly rural state with the second largest number of farms in the country and agriculture the main occupation in 97 of its 114 counties. US statistics starkly reveal how road accidents in rural areas tend to be more serious than in urban regions and of the 32,000 US motorists killed each year, 54% die on roads in rural areas even though onl
    Read More

Highlighted Content