Victoria Police have defended their use of camouflaged traffic police to detect speeding motorcyclists.

Police wearing camouflage gear with radar guns have been used for the last five years in the Yarra Ranges, around Mount Baw Baw, the Latrobe Valley and the Surf Coast.

Acting Superintendent Michael West says the tactic has reduced road trauma in the Yarra Ranges by almost 47 per cent.

He says it is purely practical because they would stand out too much in their navy blue uniforms.

"We do it in that manner because of the terrain, particularly around that area, leads us to it," he said.

"We're using a tailor-made uniform or clothing to suit the terrain."

He says it is not about trying to entrap drivers. It is only an effort to drive down the road toll.

"Any initiative we can adopt to reduce the incidence of trauma or death in the community, Victoria Police are very committed to at least looking at," Acting Superintendent West said.

"And this one has been a success."