A driver is in a critical condition after being rear-ended by a B-double on the Hume Freeway.
Emergency services were called to the freeway between Winton and Glenrowan about 11.15pm on Wednesday.
A Drysdale man, 54, was travelling north in a 1964 ex-army amphibious vehicle at about 80km/h when he was hit from behind.
The impact caused the vehicle to roll down an embankment and eject him through a hatch.
Police struggled to find the vehicle due to darkness.
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They eventually found the man about 10 metres from the vehicle after he shouted out for help.
He was airlifted to The Alfred Hospital in a critical condition.
The truck driver has been spoken to by police and released pending further enquiries.
Any witnesses can contact police on (03) 5723 0888.
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