Elevated Bus that drives over traffic

With many crowded roads and highways, there are bound to be accidents. With this new invention, there are no interruptions. China's Elevated bus drives over traffic on the highway without hitting any other cars. The bus covers two lanes and is fairly long.  This bus is navigated by fixed rails so it doesn't cause any chaos itself. What happens if a small car crashes into the busses side while driving under? Can a cargo truck get underneath? The bus measures 72x 25x 16 (Length x width x height).http://www.coolthings.com/china-transit-elevated-bus-drive-over-traffic/  

Buss driving over traffic

Buss driving over traffic

Buss can hold many people but what happens if a small car crashes into the buss?

Buss can hold many people but what happens if a small car crashes into the buss?