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Thu Mar 20 2014 04:30:53 GMT+0000 (Coordinated Universal Time)

On street circuits like Monaco and Singapore, the manhole covers require welding shut prior to F1 races.

It's not for a fear of large rats AKA R.O.U.S. It's because the amount of suction created by a Formula 1 car when it travels over a road, is enough to rip a manhole cover off.

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