Approaching Junctions Using MSPSL: The 5-Step Routine Every UK Driver Must Know

Every time you approach a junction in the UK, you should follow the MSPSL routine. It's the systematic framework that ensures you cover all the essential observation, communication, and speed management steps before entering a new road or crossing a junction. Miss one step and you've created a hazard or a test fault.

The MSPSL Routine Explained

MSPSL stands for Mirror → Signal → Position → Speed → Look. Here's what each step means in practice:

• Mirror: Check your interior and relevant door mirrors to understand what's behind and beside you.
• Signal: Indicate your intention (if turning) in good time so other road users can plan.
• Position: Move to the correct lane position for the turn (left for left turns, right for right turns within your lane).
• Speed: Reduce to an appropriate speed for the junction — slow enough to stop if necessary.
• Look: At the junction, look in all relevant directions before proceeding.

Why the Order Matters

Each step depends on the one before it. You check mirrors before signalling because you need to know if it's safe to change position. You signal before positioning because other drivers need warning of your intention before you move. You adjust speed after positioning because a smooth, gradual slow-down is safer than braking hard late. You look last because you need to be at the correct speed and position before assessing whether the junction is clear.

Common MSPSL Mistakes

The most frequent errors in the MSPSL routine:

• Signalling before checking mirrors (reversing M and S).
• Braking before signalling — telling no one you're stopping.
• Looking too early (while still travelling fast, before you can safely stop).
• Looking only left-right, not checking for cyclists from behind or pedestrians crossing.
• Positioning in the wrong lane before signalling.

Applying MSPSL to Different Junction Types

The routine applies universally, but its application varies:

• T-junction (turning left): MSP (move left), S (reduce speed to 10–15mph or stop), L (look right-left-right).
• T-junction (turning right): MSP (position near centre line), S (reduce, stop if needed), L (look right-left-right).
• Crossroads: MSPSL in full — crossroads have four potential conflict points.
• Roundabout: MSPSL applies to the approach; signalling rules specific to roundabouts apply inside.

Instructor's Tip

Practice narrating MSPSL aloud during lessons: 'Mirror… signal left… position left… reducing speed… look right, left, right, clear, going.' Narration forces your brain to complete each step deliberately. Once the routine is fully internalised, the narration drops away and MSPSL becomes the unconscious backbone of every junction approach.