Navigating Slow - Moving Traffic :

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Highway Code Rule 151

📖 Rule 151 Full Regulations & Explanation

Rule 151 ↗
In slow-moving traffic. You should

reduce the distance between you and the vehicle ahead to maintain traffic flow
never get so close to the vehicle in front that you cannot stop safely
leave enough space to be able to manoeuvre if the vehicle in front breaks down or an emergency vehicle needs to get past
not change lanes to the left to overtake
allow access into and from side roads, as blocking these will add to congestion
allow pedestrians and cyclists to cross in front of you
be aware of cyclists and motorcyclists who may be passing on either side.

Text shown in the rule image

Navigating Slow - Moving Traffic :

The Rule 151 Guide

Spacing and Maneuverability

Lane Discipline & Road Access

Vulnerable Road Users

Reduce Distance to Maintain Flow

Decrease the gap between you and the vehicle ahead to keep the line moving efficiently .

Maintain a Safe Stopping Buffer

Never get so close you lose the ability to stop safely if they brake suddenly .

No Overtaking on the Left

Even in slow queuss , you must not change lanes to the left specifically to overtake .

Keep Side Roads Clear

Do not block access to or from side roads ; blocking these junctions significantly increasee overall local congestion .

Leave Space for Emergencies

Ensure room to maneuver if the car ahead breaks down or if an emergency vehicle needs to pass .

Allow Crossings for Pedestrians and Cyclists

Be prepared to stop or yield to allow pedestrians and cyclists to safely cross .

Watch for Filtering Traffic

Stay alert for cyclists and motorcyclists who may be passing your vehicle on either the left or the right side .