A cyclist is lucky to be alive after allegedly being mown down in a road rage incident in central Perth - one of three car-versus-bike crashes in one day.

Derek Holland, 24, was cycling with friend Mike Dann along Beaufort Street just after 8am on Tuesday when the pair are said to have been narrowly missed by a car, according to Mr Dann.

Cyclist Derek Holland was hit by a car outside the Perth Police Station on Beaufort Street. Credit:Ryan Miller

He claims that the driver then drove at the pair after an altercation between them.

Fortunately for Mr Holland, the incident was witnessed by two detectives outside the Perth Police Station, known as Curtin House, who came to his aid.