Environmental Driving and Fuel Efficiency
Environmental driving questions combine fuel-saving technique with Danish low-emission zone rules. A C1 truck uses more fuel than a van, so smooth driving, correct tyre pressure and route planning have a measurable effect. The exam also checks that you know where environmental zones operate and what a diesel vehicle needs to enter.
Eco-driving technique
- Accelerate progressively and change gear early. Look far ahead and ease off before junctions rather than braking late.
- Use engine braking and cruise control where appropriate. Avoid unnecessary idling; switch off the engine during longer stops.
- Keep tyres at the recommended pressure. Under-inflation increases rolling resistance and can overheat the tyre.
- Remove unnecessary aerodynamic drag and do not carry unnecessary weight. Plan the route to avoid congestion and unnecessary detours.
- Use AdBlue correctly if the vehicle has SCR. Do not ignore emissions warnings or DPF regeneration needs.
Environmental zones
- Denmark has environmental zones (miljøzoner) in Copenhagen, Frederiksberg, Aarhus, Odense and Aalborg. Diesel vans and trucks must meet the local emission requirements, typically through an approved particulate filter or a sufficient Euro emission class.
- Foreign vehicles must be registered for the zone where required. Entering without compliance can lead to a fine.
Worked example
You idle for 15 minutes each day before loading, over 250 working days. That is 62.5 hours of unnecessary idling. At roughly 1 litre of diesel per hour at idle, you waste about 62 litres and add unnecessary emissions. Switching off during the wait saves fuel and reduces noise and exhaust exposure.
Traps that cost marks
Do not assume only Copenhagen has an environmental zone. Do not treat AdBlue as optional; running out can derate the engine. Hard acceleration and late braking increase fuel use. A roof rack or open body used empty still adds drag.