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

  • Virginia Tech reveals vested interest
    May 9, 2019
    New ITS systems on either side of the Atlantic – such as an intriguing piece of connected clothing – aim to reduce the casualty toll among road maintenance personnel, says Alan Dron t’s not a lot of fun working on road maintenance or road construction worksites. By definition, you’re out in all weathers. You’re not popular with motorists, who blame you for hold-ups. It’s frequently physically arduous. And, worst of all, the sector has an unenviable record of injuries - even fatalities. Often working jus
    Read More
  • FCC consortium to build Colombia tunnel project
    November 2, 2015
    A consortium led by Spanish company FCC has been awarded a contract for the Toyo tunnel project, including design, construction, operation and maintenance of the tunnel in the Urabá Port, around 80 kilometres from Medellín, Colombia. The US$432 million project, which is expected to take ten years to complete, is located between the municipalities of Giraldo and Cañasgordas, around 500 kilometres north-west of Bogotá. It includes the building of a completely new road section, 41 kilometres long with one
    Read More
  • FTA calls for greater reliability on road network following improvements at Dartford
    October 14, 2015
    Drivers using the Dartford Crossing at peak times are saving around an hour and a half every week thanks to Dart Charge, according to Highways England. New figures released by Highways England show that journeys over the Dartford Crossing, which cost £62million (US$95 million) to convert to free-flow tolling, are up to 56 per cent faster than before payment barriers were removed. Drivers at peak times save up to 14 minutes southbound and seven minutes northbound.
    Read More
  • Major road projects to improve journeys in Merseyside and Cheshire
    September 1, 2017
    Two major new road schemes worth more than US$388 million (£300 million) are set to cut congestion and improve journey times for hundreds of thousands of drivers in Merseyside and Cheshire, UK. Highways England has set out its preferred options for upgrading the key route to the Port of Liverpool and creating a new junction on the M56 near Runcorn following public consultations earlier this year.
    Read More

Highlighted Content