A bus provided with safety means (1) which protect the passengers in the bus from being trapped in case the bus should turn over or roll over. The safety means comprise a number of substantially vertically extending stiffening beams (2) of an elastic material, for example a composite material, which are connected to the side walls of the bus. The stiffening beams may form part of a roll-over bar, which extends the length of one side wall, the roof and the other side wall of the bus.
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