Question to the Department for Transport:
To ask the Secretary of State for Transport, what research his Department has undertaken on the impact of surface water on road safety during wet conditions.
The Government has not commissioned research on the impact of surface water on road safety. However, guidance in the Highway Code, Wet Weather (Rule 227), is based on evidence on wet weather and typical stopping distances.
The Highway Code, Wet Weather (Rule 227):
In wet weather, stopping distances will be at least double those required for stopping on dry roads (see ‘Typical stopping distances). This is because your tyres have less grip on the road. In wet weather: