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

  • TRL: Cities must do more to help VRUs
    May 9, 2019
    UK cities must learn from the Netherlands and Denmark if active travel and increased safety for vulnerable road users are to co-exist, says TRL’s Marcus Jones Active travel’ refers to modes of transport in which physical effort is required to undertake purposeful journeys - for example, walking or cycling to school, work or the local shops, as well as walking and standing as part of accessing public transport. The benefits of replacing short car journeys with more active forms of transport are obvious. Act
    Read More
  • Emissions reductions targets to have major impact on transport
    October 28, 2015
    As bold moves aimed at reducing greenhouse gas emissions have been introduced in California, David Crawford looks at the ramifications for transportation. California Governor Jerry Brown’s recent dramatic raising of the bar on emissions reduction policy for the state has won him praise from Japan, Australia, Europe and the secretariat of the critical UN conference on climate change being held in Paris in November/December 2015. His April 2015 executive order aimed at bringing emissions to 40% below 1990 lev
    Read More
  • Swiss Federal Roads Office showcases INA architecture
    October 23, 2012
    The Swiss Federal Roads Office will showcase a traffic management and control system based on a service-oriented architecture called INA (Integrated Applications). This system will allow the integration of all parties relevant to traffic management such as national and regional Traffic Management Centres (TMCs) and the police. The Zurich regional TMC will demonstrate how cooperation happens between the canton, the cities of Zurich and Winterthur as well as the national roads in the conurbation around Zurich
    Read More
  • All-electronic toll collection success in Denver
    January 30, 2012
    Teri England, Diamond Consulting Services Ltd, describes the E-470's switchover to all-electronic toll collection. In June 2007, the E-470 Public Highway Authority made the business decision to transition to an All-Electronic Toll Collection (AETC) system - in other words, become a cashless road.
    Read More

Highlighted Content