The real road includes texture, smoothness, rut, road type, altitude, mileage, and more.

真正的路面包括纹理、平整度、车辙、路型、高程、里程等信息。

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How do we know if the road type is swamping any effect from traffic density?

BBC: Crashes

Because the Department of Transport also has figures by type of road, and says the most dangerous is the single carriageway A-road, of which Northumberland certainly has a few.

BBC: Crashes

On Monday, the police staged a reconstruction of a road collision to demonstrate the type of destruction that can be caused by drink-drivers.

BBC: NEWS | UK | Northern Ireland | Drink-drive deaths revealed