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

  • Measuring alertness to avert drowsy driver incidents
    December 21, 2015
    Falling asleep at the wheel is the primary cause in thousands of deaths on American and other roads, with truck drivers the most at-risk group. David Crawford investigates measures to counter drowsy driving.
    Read More
  • Trafik Stockholm uses data gathered from Bluetooth and Wi-Fi to alleviate congestion
    November 20, 2017
    Trafik Stockholm (TS) has chosen Blip Track technology from Denmark-based Blip Systems to alleviate congestion on the city's road by providing live traffic information via real-time and historical travel flow data from road users’ Bluetooth and Wi-Fi devices. Travel times are continuously updated in line with the behaviour of road users so that by considering their route and the time they depart, they can help to reduce bottlenecks and keep traffic moving. The technology provides a birds-eye view of the
    Read More
  • Bristol’s buses trial CycleEye detection system
    July 7, 2017
    Fusion Processing’s Jim Hutchinson looks at a two-year trial of the company’s cyclist detection system. Is cycling in a city dangerous? Well, that depends where you are and how you view statistics. Malmö is far more bike-friendly than Mumbai and the risk can either be perceived as small - one death per 29 million miles cycled in the UK in 2013 - or large - that equated to 109 deaths in the same year. Whatever your personal take on the data, the effect of these accidents can be felt indirectly too. News of c
    Read More
  • Demand management schemes, is there a better way?
    January 31, 2012
    The European Commission is placing too much emphasis on the use of demand management, according to the FIA. Here, Wil Botman, Director-General of the FIA's European Bureau, explains why. Towards the end of last year, the European Bureau of the Fédération Internationale de l'Automobile (FIA) released a statement which criticised the European Commission's (EC's) approach to urban traffic congestion following the adoption of the Action Plan on Urban Mobility. In particular, the FIA voiced concerns over what it
    Read More

Highlighted Content