Advanced training in rational driving based on safety regulations
This domain tests rational, defensive and fuel-efficient driving of a heavy vehicle within the safety regulations. The examiner wants anticipation, correct speed choice, disciplined use of brakes and gears, and an understanding of why each technique is safer - not just cheaper.
Anticipation and space
Scan 12–15 seconds ahead in built-up areas and 20–30 seconds on rural roads. Read junctions, bus stops, crests and parked cars before they become emergencies. Hold at least a three-second gap to the vehicle ahead, four or more in rain, and double it on ice. Space is the cheapest safety device on the vehicle.
Drivetrain and braking
Accelerate progressively and upshift early, around 1,200–1,500 rpm in a loaded artic. Use the retarder and engine brake as the primary braking tool on descents, selecting a low gear before the slope, so you rarely touch the service brakes - heat, not speed, causes fade. On overrun the engine cuts fuel, so rolling in gear is free; coasting in neutral is illegal, defeats engine braking and is a classic exam trap.
Worked example
A 40-tonne combination approaches a 6% descent signed at 80 km/h. The driver lifts off, selects a gear that holds about 60 km/h at 2,000 rpm, sets the retarder to its second stage and keeps a four-second gap. Reasoning: kinetic energy grows with the square of speed and brake energy with mass, so a lower entry speed plus continuous retarder use keeps the drums cool and leaves the service brakes for the emergency that never comes.
Traps
- Treating eco-driving as slow driving; smooth and predictable wins.
- Eco-rolling downhill in neutral.
- Using cruise control on twisty or icy roads.
- Believing 10 km/h extra on a 100 km trip at 80 saves a lot - it saves roughly eight minutes.