A road worker is hit by a modified car during a police pursuit. However, when the driver fails to stop, the race is on to track the car down and bring the offender to justice.

When a cyclist dies just nine minutes into a time trial on a dual carriageway, a van driver’s arrested. But a single mark on the road surface raises more questions than answers.

The collision team investigate a late-night crash on an unlit dual carriageway but are stunned to discover the seriously injured man was travelling on an electric scooter.

Two men on a powerful sports bike fight for their lives after crashing into a wall. A seriously injured woman is cut free from the wreckage when a car collides with a stationary lorry.

Two lorries collide on an industrial estate, leaving one driver injured and investigators searching for answers. But as the evidence is unpicked, one driver's story starts to unravel.

When a woman riding an e-scooter is struck by a car, all viewpoints must be considered. And a crash triggers an automated call from a seriously injured tourist's motorbike.

A meticulous search for evidence is launched to find out why a driver lost control and collided with a lorry on a dual carriageway. Piece by piece, a clearer picture begins to form.