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If you need to stop your vehicle in the event of a breakdown or incident, try to stop in a place of relative safety. A place of relative safety is where you, your passengers and your vehicle are less likely to be at risk from moving traffic.
The safest place to stop is a location which is designed for parking. On motorways and other high-speed roads, the safest place to stop is a service area. Other places of relative safety include

• lay-bys
• emergency areas (see Rule 270)
• hard shoulders (see Rule 269).

Be aware that hard shoulders provide less protection than other places of relative safety because they are so close to high-speed traffic.
You and your passengers should, where possible, keep well away from your vehicle and moving traffic. Otherwise moving traffic could collide with your vehicle, forcing it into you and your passengers.