Vehicle Controls and Safe Driving Technique
What this domain tests
Whether you can operate clutch, gears, brakes and steering smoothly and correctly, especially in a loaded commercial vehicle on Kenya's gradients, and whether you understand how systems such as ABS and exhaust brakes actually behave.
Before you move
Run a cockpit drill: seat adjusted so the clutch can be fully depressed, mirrors set, seat belt on, gear in neutral, handbrake on, then start and check gauges and warning lights before selecting first.
Core technique
- Steering: push-pull method with hands at nine and three or ten and two; never dry-steer a stationary vehicle.
- Gear selection: match the gear to the road and load; use the lowest practical gear on descents, and let the engine and exhaust brake do the work.
- ABS: press firmly and hold. Do not pump the pedal - the system does that for you and pumping only lengthens stopping distance.
- Braking: progressive pressure, released smoothly as you stop, so following traffic sees your brake lights early.
- Never coast in neutral or with the clutch held down; you lose engine braking and control.
- Reversing: use mirrors and a banksman for blind sides on lorries and buses.
Worked example
You are descending a long escarpment in a loaded lorry and the brakes begin to feel weak and smell hot. The correct response is to select a lower gear before the speed builds, let the exhaust brake hold the vehicle, and if necessary stop in a safe lay-by to let the drums cool. Riding the brakes harder, or pouring water on hot drums, risks fade or cracked drums and total brake loss.
Traps that cost marks
Slipping the clutch on hill starts, coasting downhill to "save fuel", pumping ABS, and braking late and hard so the load shifts forward. All of these are control failures the examiner can see immediately.