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Managing multiple hazards on key link road junction


Managing multiple hazards on key link road junction 1

The scenic A701 connects Dumfries with Edinburgh through rural countryside. Several serious and fatal incidents have occurred on the first 20 miles, which provides the primary link between Dumfries and the A74 (M) for traffic heading northbound to Glasgow or Edinburgh.

A junction near Beattock on a long sweeping bend was identified in a safety report as particularly hazardous. It recommended the installation of a Vehicle Activated Sign for warning of hazards ahead, informing oncoming traffic of vehicles waiting to turn and slowing down speeding drivers.


Together with partners Clearview Intelligence, Coeval designed an innovative solution for warning of hazards ahead that combines both Vehicle Activated Hazard and Speed Warning into a single sign. The ‘Vehicles Turning’ Hazard Warning sign is activated when vehicles are detected approaching the stop line on the A7076, or turning right across oncoming traffic on the A701 onto the A7067. The use of inductive loops and ‘count and classify’ detection ensures regular users of the route don’t become complacent to the hazard as they might with a static sign.

Key Highlights

  • Highly visible hazard warning sign
  • Alerts drivers to the junction and encourages them to consider vehicles joining their carriageway
  • Encourages speed compliance
  • Year-round, reliable solar-powered solution deployed in a location where access to mains power was not available

The ‘Slow Down’ Speed Warning message for drivers travelling too fast increases the effectiveness of this system and achieves two safety benefits from a single installation. The entire system is powered by just two solar panels, meaning less maintenance and reliable, environmentally-friendly operation in an area where mains power is unavailable.

“The use of inductive loops and ‘count and classify’ detection ensures regular users of the route don’t become complacent to the Hazard as they might with a static sign.”

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What our clients say

Connect Plus Services M25 Dartford Crossing

‘Even a short closure of the tunnel causes great congestion in the area, and if an over height vehicle were to cause that level of damage, the tunnel could be closed for hours, if not days, which would bring the whole of the South East of England to a standstill.

When the Coeval over height vehicle detectors were first installed, we were talking about 10’s of vehicles a day that we were stopping; we are now down to low single figures, 4 or 5 vehicles a day we need to extract for being over height, so it’s a great improvement in efficiency through the crossing.’

Platinum Electrical Ltd

‘Having used Coeval for the first time, we found them to be friendly and really helpful in ensuring we received the correct item we required. We were happy with the extremely quick response times and professional service they offer. We would definitely recommend their services to others.’

Gloucestershire Airport

‘Thank you for your prompt and efficient service regarding our request for training on the 21st of August. You guys have been incredibly helpful over this.’

City of Edinburgh Council

‘Coeval won the tender for the replacement overheight vehicle detector systems. The work was completed within programme and budget. We are now satisfied that the new systems will help protect the bridges for several years to come.’

Swindon Borough Council

‘A sound, honest and efficient service provided by Coeval. Would be very happy for Coeval to manufacture and supply more of Swindon’s signs.’