Environmental protection, vehicle emissions and eco-driving
Environmental protection, vehicle emissions and eco-driving
This domain tests how a bus driver reduces fuel use, emissions and noise without compromising safety or the timetable. The exam rewards smooth planning and correct use of emission-control systems.
Core rules
- Eco-driving starts before moving: correct tyre pressures, no unnecessary load, clean air filters and a properly serviced engine reduce fuel consumption.
- Accelerate smoothly and use the highest safe gear. Anticipate stops, release the accelerator early and let the bus slow naturally. Avoid racing to red lights and hard braking.
- Switch off the engine during longer stops and at terminals where idling is not needed for safety or comfort. Idling burns fuel and increases local pollution.
- Use air-conditioning and heating efficiently. Keep windows closed at speed, but do not use recirculation when windows mist up.
- Know the emission system: diesel particulate filter regeneration, AdBlue level, and warning lamps. Do not ignore a DPF or emissions warning; continued driving can damage the system and increase emissions.
- Plan routes to avoid congestion and unnecessary mileage. Report excessive smoke, fuel or AdBlue leaks. Dispose of waste and fluids at approved points, never down drains.
Worked example
A driver waits 20 minutes at a terminal in summer. Keeping the engine idling for air-conditioning wastes fuel and creates local emissions. The better choice is to switch off, use terminal facilities, and restart only when needed for passenger comfort or departure. If the bus has a DPF warning, the driver follows the manufacturer's regeneration procedure rather than ignoring it.
Traps
Candidates lose marks by thinking eco-driving means driving slowly, by coasting in neutral, by ignoring an AdBlue or DPF warning, and by overfilling fluids. Another trap is treating idling as harmless: it is a measurable fuel and emission cost.