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

  • Authorities look to MaaS for new solutions and cost savings
    July 18, 2017
    The structure of society and the way in which our cities work will be completely transformed by Mobility as a Service (MaaS), Finland’s minister of transport and communications Anne Berner, told ITS International’s recent MaaS Market conference 2017 in London. In her keynote address, Berner told a packed audience of more than 200 ITS professionals that MaaS has the potential to help governments around the world meet their big city targets such as the rate of employment, the environment, the efficient use of
    Read More
  • PTV’s software solutions help cities combat congestion and pollution
    January 25, 2018
    Smart cities must rely on a mobility mix, real-time predictive models and collaborations, argues PTV’s Miller Crockart. Transport is reaching a new frontier and cities are at the forefront of the trend: for many urbanites, mobility no longer equals a privately-owned vehicle. They want on-demand services that cater for their individual mobility needs efficiently and sustainably - whether that is shared bikes or autonomous electric vehicles. Private car ownership will not drop overnight. The smooth
    Read More
  • San Francisco and Inrix partner on expanding Bay Area 511 service
    October 30, 2013
    San Francisco Bay Area's popular 511 service is set to expand its traffic speed network. Coverage, now mostly limited to state roadways and interstates, will be expanded to include additional state roadways, major arterials, expressways and connectors. The Metropolitan Transportation Commission (MTC), which runs the 512 service, assembles data from a variety of sources – Caltrans, CHP, and other partners – to provide the most accurate and reliable information about incidents and traffic disruptions in th
    Read More
  • Asking drivers what information they need: radical but effective
    March 19, 2014
    When Texas A&M Transportation Institute was asked to devise a temporary traveller information system for work zones, it started by asking drivers what they need. Robert Brydia explains the thinking, implementation and results. US Interstate 35 (I-35) runs roughly north–south originating in Laredo, Texas and ends 1,500 miles away in Duluth, Minnesota having passed through Oklahoma, Kansas, Missouri and Iowa. Within Texas the I-35 splits into I-35E and I-35W passing through Dallas and Fort Worth respectiv
    Read More

Highlighted Content