The cyclist had a wife and several adult children, he said. "They are devastated, that's the only words to describe it," he said. "Really, really devastated." It's believed the man was an avid cyclist who rode often in the Frankston South area. He was cycling on a white Reid Asprey racing bike and wearing a white helmet at the time of the crash.

The truck driver, 53, of Noble Park, stopped at the scene and assisted police with inquiries. No charges have been laid. Acting Senior Sergeant Hayes said the stretch of the Moorooduc Highway where the incident occurred was considered semi-rural, but was still a busy stretch of road. "It actually does take a significant volume of traffic," he said. "It's quite frequently used by traffic and that does include cyclists. "The biggest message we can give to the majority of Victorians travelling home from holiday destinations ... is drive to the conditions of the road. Utilise your fatigue breaks and generally maintain safe and good driving," he said. Northbound lanes on Moorooduc Highway remained closed between Tyabb and Bungower Roads on Monday evening, VicRoads said.

Police were also warning motorists to avoid the area as investigators worked to determine the cause of the crash. Four people died in 24 hours on Victorian roads at the end of the long weekend, including a 50-year-old man who died after his vehicle hit a tree and flipped onto its roof at 7.30pm on Sunday on Pomonal Road in Stawell. A 28-year-old Melton man was killed in Hopetoun Park at midday on Monday after he was struck by his vehicle while trying to reattach the trailer. The incident took place on a dirt track under the Djerriwarh Creek bridge on the Western Freeway, where the man was driving a Mitsubishi Delica up a steep incline. It is believed the trailer he was towing became detached from his vehicle, and he reversed back down the track and got out to reattach the trailer. The vehicle then slid down before colliding into the driver causing fatal injuries.

The man is believed to be a young father who was out driving with his brother. A second passenger in the vehicle was not injured. A motorcyclist also died in an incident on Monday morning in the state's north. The man was killed when his motorcycle and a car collided on the Northern Highway at Heathcote. Two women in their 60s who were in the car were treated for shock. Anyone who witnessed the collisions is urged to contact Crime Stoppers on 1800 333 000.