This Russian tanker carrying 18 tons of fuel shows it's really not that hard. The 12-wheeler takes a roundabout slightly too fast, and everything comes tumbling down.
When it comes to how fast you drive, it's not just a question of legal speed limits, but knowing the limit of the road. It's easy to go too fast on tight roads, in snowy conditions or in fog. For this tanker, even regular city speeds are too high for a big roundabout.