Following a breakdown on a two-way road, how far from your vehicle should you place a warning triangle?

Explanation: Advance warning triangles are used to warn other drivers that you've broken down or been involved in an incident. It should be placed at least 45 metres (147 feet) behind the obstruction, on the same side of the road or on the verge nearby. If the obstruction will be hard for approaching traffic to see (e.g. around a bend or in a dip), place it even further back. Advance warning triangles should not be used on motorways.

Category: Incidents, accidents and emergencies (2021)

References: The Official DVSA Guide to Driving: Section 15, Highway Code: Rule 274