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

  • Vivacity demos AI junction control
    March 18, 2021
    How will AI-controlled junctions help smooth the journeys of drivers – and cyclists - in urban areas? Alan Dron looks at an expanding scheme in Manchester, UK, which aims to find out
    Read More
  • Trials of new technologies to counter age-old work zone challenges
    May 19, 2017
    New solutions are being used to improve the management and safety of work zones on roads both big and small, as Jon Masters discovers. The UK government has recently been going to some lengths to paint a picture of a nation embracing a future of digital technology – understandably given the economic concerns arising from exiting the European Union. In December last year, however, the UK National Infrastructure Commission (NIC) put down a somewhat different marker for where the UK is now in terms of mobile c
    Read More
  • Xerox counts on machine vision for high occupancy enforcement
    October 29, 2014
    Machine vision techniques can provide solutions to some of the traffic planners most enduring problems With a high proportion of cars being occupied by the driver alone, one of the easiest, most environmentally friendly and cheapest methods of reducing congestion is to encourage more people to travel in each vehicle. So to persuade people to share rides, high occupancy lanes were devised to prioritise vehicles with (typically) three of more people on board and in some areas these vehicles are exempt from
    Read More
  • App informs drivers of delays during Long Beach bridge replacement
    June 6, 2014
    David Crawford previews a work zone travel breakthrough. In February 2014, the Port of Long Beach in California launched what it claims is a groundbreaking construction zone navigation aid - LB Bridge mobile app. The app is designed to help drivers during the Gerald Desmond Bridge replacement programme by keeping them up to date on activity and the ensuing traffic diversions when construction starts in summer 2014. The unusually content-rich app is designed to convey current project news (enlivened by phot
    Read More

Highlighted Content