Police are yet to identify a cyclist who has died in hospital after a crash with a car in Riverton on Monday morning.

The accident occurred at the intersection of High Road and Willeri Drive about 6am.

The cyclist was taken to Fiona Stanley Hospital but passed away shortly after arrival. 

The man, believed to be in his 40s, is yet to be identified.

Willeri drive was closed following the accident, causing congestion after all west-bound traffic on the busy road had to be diverted.

Anyone with information to help identify the cyclist is asked to call Crime Stoppers on 1800 333 000.