Police will prepare a report for the Coroner after the death of a man in a single vehicle crash at Colyton this morning.
About 5.15am, emergency services were called to intersection of Hewitt Street and Roper Road.
It appears a single vehicle has failed to negotiate the intersection, struck metal railings and rolled.
The vehicle eventually stopped in a creek bed.
Police from Nepean Police Area Command have attended the location and established a crime scene.
A male passenger in the vehicle was treated by Ambulance paramedics and has been conveyed to Westmead Hospital for observation.
The male driver of the vehicle died at the scene.
Local traffic diversions are in place and motorists are advised to avoid the area.
Police have appealed for anyone who witnessed the crash or with dash cam footage of the incident to come forward.