To keep traffic moving on the M90 over the Forth, an improved level of driver behaviour amongst road users is required.

To encourage compliance with the variable speed limit a camera enforcement system called HADECS (Highway Agency Digital Enforcement and Compliance System) will be operational.

A six-camera spot speed HADECS system is deployed on a 22km of the road network between the M90 at Halbeath and the M9 north of Newbridge.

Over this stretch of the road network there are over 200,000 vehicle movements every week. Over 30,000 vehicles are speeding on some sections of the route with over 4,000 vehicles speeding excessively. This has been causing stop start conditions, congestion and less reliable journey times, with journeys taking on average up to 5 minutes longer at peak times.

The HADECS camera system aims to encourage improved driver behaviour and enhance the levels of compliance with the variable speed limit. This is anticipated to lead to smoother traffic flows during busy periods and more reliable journey times.

More info here : https://www.theforthbridges.org/plan-your-journey/road-user-guide/intelligent-transport-system-its