A motorcylist suffered life threatening injuries after colliding with a parked car on Pontefract Road in Knottingley.
Police were called to the scene , close to the junction with the A162 Ferrybridge Bypass, at around 4am this morning (Monday).
The rider, a man in his 20s, was taken to Leeds General Infirmary by ambulance with life-threatening injuries.
Pontefract Road was closed while police and paramedics dealt with the incident but is now fully reopen.
Anyone with any information about the incident should call police on 101.