Average speed cameras work by monitoring a vehicle's speed over the distance of the safety camera zone

The cameras work by monitoring a vehicle's speed over a certain distance, rather than at a single point.

A fine and penalty points were issued

The crash happened on the N5 at Deerpark near Swinford.

One youth is understood to be in a critical condition

The project will see a new 34km single carriageway road built between Ballaghaderreen and Scramoge