You're probably thinking of a hearse.
Hearse
A trailer or cattle-liner.
umm a boat?
A car transporter.
A horse box or horse trailer.
The radioactive placard on a vehicle indicates that the vehicle carries some amount or regulated radioactive material.
Lenny
All vehicles carry things.
Vector
motercycle
It is called a Hearse. A hearse is a funeral vehicle used to carry a coffin from a church or funeral home to a cemetery. In the funeral trade, hearses are often called funeral coaches.