A motorcyclist suffered a wrist injury after the white Honda scooter he was driving left the road.
The incident happened at 6:40am on the A614 just outside the village of Carnaby on Wednesday 8 April, 2015.
The 23 year old motorcyclist from Bridlington collided with the grass verge as he avoided an oncoming vehicle.
The approaching vehicle, a red Vauxhall Astra car, was overtaking a lorry on the opposite carriageway.
The car did not stop following the incident.
The driver of the Astra or anyone with information is asked to call 101 quoting log number 171 of 8 April, 2015.