Explanation

"Regardless of a driver's experience, the Mirrors - Signal - Manoeuvre (MSM) routine should be an integral part of their driving. The Manoeuvre part is broken down into P - Position - Position your vehicle correctly and in good time. S - Speed - Adjust your speed as necessary for the manoeuvre. L - Look - Look for other traffic or road users when you reach a point from which you can see. Assess the situation, then decide whether it's safe to proceed and act accordingly."