He said the government's push to have heavier and longer trucks operating on a number of Victoria freeways, highways, arterial and local roads would be a threat to road users.

"A number of people have spoken to me raising concerns about traffic safety on country roads, should B-triples be allowed," he said.

"Many issues need to be addressed such as increasing the number of overtaking lanes and extending their length to at least 1.8 kilometres, which is the preferred length.

"There also needs to be a boost in the number of high- quality truck stops. These are vital to alleviate driver fatigue."

Mr Delahunty said Wimmera councils were concerned about multi-million-dollar roadworks bills if B-triples were allowed on arterial and local roads.

"There are about 1400 heavy vehicle movements in Horsham a day, and this number is increasing with more using the Western Highway," he said.

"Truck accidents are of concern on sections of this highway.

"I have been contacted by a number of older drivers, in particular women, who are concerned with the possibility of these longer, heavier vehicles being on the road, and who have informed me that they do not drive on the Western Highway at night and are fearful of accidents, especially when it is raining, because of the number of heavy vehicles."