4
3
Dashcam footage shows the harrowing moment a suspected sleeping lorry driver kills two men after ploughing into a line of vehicles on a US highway.
The distressing video shows how the driver of the truck ignores frantic signals to stop and smashes into the back of a parked red pick up and a Toyota Carolla.
Christoper Markley, 34, and his friend Robert Jay Barnes, 50, died after they were thrown from a third vehicle during the incident on Nevada's Highway 93 on July 18.
In the clip, released by the Nevada Highway Patrol, a flagger is seen standing in the middle of the highway, ordering several vehicles to stop as construction work is completed up ahead.
The flagger urgently waves his hands to alert the speeding lorry but turns and flees as it fails to respond.