Police are appealing for information after a man was found dead on the roadside in a suspected hit-and-run.

A passerby found the body of the 40-year-old Traralgon man about 9am on Thursday on the Princes Fwy overpass above Princes Dr in the southeast Victorian town of Morwell.

Investigators believe he was struck by a vehicle sometime between 1am and 9am, with the driver leaving the scene.

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Detectives are urging Traralgon-bound motorists who were on the Princes Fwy during that time to check their dashcams.

“Motorists may have inadvertently captured the man as he was walking in the area, or the vehicle involved,” police said.

Officers will remain at the scene for most of the day as investigations continue.

Anyone with information or footage is urged to come forward.