Police are seeking a careless driver who knocked down a line of traffic cones which led to a pile-up on the A38.
The incident happened on Thursday 14th January near Marsh Mills.
As a result of the cones being struck, there was a 3 car collision further up the carriageway (see footage)
Police have now released the footage in an attempt to trace the driver who left the scene without calling for help.
Sergeant Gary Williamson, of Plymouth Safer Roads Support Unit, said: “There is no doubt that the poor driving and careless actions of this driver led to this collision.
“Oncoming motorists had no warning that the lane three contraflow was closed off and had to take evasive action. The confusion has then created perfect conditions for the collision further back.
“Not only does the driver then stop on the carriageway, causing a further hazard, but then leaves the scene without the presence of mind to call police about the danger they have left behind.
“We wouldn’t expect the person to get out and move the cones as this is not safe but in the very least they should have pulled over and called police. Their actions were incredibly negligent and showed no regard for the safety of other drivers.
“It is extremely lucky that this collision was minor, although it has caused inevitable distress to the motorists involved. This could have easily caused an extremely serious, or even fatal, accident.
“We are asking the driver of this car to come forward and speak to us. If anyone has any information which can lead to the identity of this driver we would also urge them to contact police.
”Anyone who can help with the investigation is asked to contact police on 101 or email email@example.com quoting log number 124 of 14/01/16.”