The driver, a Rupanyup man, was turning right from May Park Terrace into Dimboola Road, Horsham.

A Horsham woman, 48, was walking with the green pedestrian light across Dimboola Road, from the Victoria Hotel side to May Park.

The driver's car hit the female pedestrian in Dimboola Road shortly before noon.

The woman sustained head injuries and bruising.

Ambulance Victoria spokesman John Mullen said an ambulance crew drove the woman in a serious condition to Horsham's Wimmera Base Hospital.

Horsham Highway Patroller Leading Senior Constable Hamish Forbes, the investigating member, said the pedestrian had right of way.

"The driver was at fault," he said.

"But we are fortunate it was a slow speed impact.

"Anything more could have led to a lot more serious injuries for the pedestrian."

Leading Sen Const Forbes said police would fine the driver about $282 for having failed to give way to a pedestrian at a pedestrian crossing.

Police will also order the driver to undergo a licence review with VicRoads.

Leading Sen Const Forbes said older drivers might have poor eyesight and such factors were considered when authorities reviewed a driver's ability to hold a licence.

The incident was the second in the Wimmera this week to involve an older road user. A man, 86, died after his gopher and a car collided in Stawell on Tuesday.