A car and bicycle were involved in a serious collision in Seaford yesterday.
The emergency services were called at 8.15am to the crash on Sutton Park Road.
A 55-year-old cyclist from Shoreham was taken to the Royal Sussex County Hospital with serious injuries.
The 59-year-old woman who was driving the blue Vauxhall Astra was unharmed.
Anyone who saw what happened is asked to contact police on 101 and quote Operation Barberry.