30/04/2026
Coasting and Engine Braking - How to get the most help from your engine.
It's the natural instinct of learners to put the clutch down on the approach to junctions. But it's doesn't help them to slow down. If it's down hill the car actually picks up speed and you have to brake more to control the car.
Rule 122 of the highway code talks about Coasting and Engine Braking.
Coasting is when neutral is selected or the clutch is down meaning the engine no longer controls the wheels.
This could result in the car speeding up downhill, steering is harder and you have to use more foot braking. It also wears the clutch out if you do it for long periods! That's expensive and stressful.
It also removes engine braking. Every gear has a max and min speed. In my Fiesta, 1st gear is 5-10mph, 2nd is 10-25mph, 3rd is 15-50mph. I did extensive testing!
And I show this to pupils. I get them to select 1st gear and move off then leave all the pedals alone. The car slows to 5mph then crawls along very happy. Then 2nd gear from 20mph and it slows us to 10mph and crawls along. That's engine braking! Engine Braking isn't as effective above 2nd gear because the range of the gear is too long plus the power to speed ratio.
So on the approach to a roundabout Mirror, Signal, Postion then Speed/Gear. Brake with footpedal down to 30mphs and change down to 2nd (bring the clutch up slowly to keep the car smooth)
The car is now bringing you down to 10mph, and you only brake a bit to help. Lovely and smooth, under control. Lots of time to look for a gap. If we need to stop, less than a car length required, back to 1st ready to move. Or see the gap and on the gas ready to go.
But if you just put the clutch down as soon as you brake, then engine doesn't help you, you have to brake much harder and then you forget about the gear change.
Pulling away in 3rd or above doesn't work. Even 2nd is pushing it. If you emerge onto the roundabout and stall that's dangerous. Make the gear change and bring the clutch up or don't use the clutch.
It makes a huge difference to your driving. Understanding this might save your life in icy conditions!