Fuel Efficiency Tips for Smart Motorway Travellers
By FuelRoute Insights · 2026-08-05
Navigating the UK's smart motorways, such as the M25 and M1, requires a bit of know-how, especially if you're looking to maximise fuel efficiency. Here are some practical tips to help you save on fuel while cruising these roads.
Understanding smart motorways in the UK
Smart motorways aim to manage traffic flow more effectively by employing modern technology. They differ from traditional motorways. The M25 and M1, for instance, are equipped with variable speed limits and traffic monitoring systems.
The principle is straightforward: when traffic becomes heavy, the motorway displays signs to adjust speed limits, helping maintain a smooth flow and reducing stops. This technology can assist in keeping a steady pace, ultimately saving on fuel.
Fuel efficiency techniques for smart motorways
When driving on the M25, one of the best techniques for saving fuel is to maintain a steady speed. Variable speed limits are there to help prevent stop-start driving, which can significantly increase fuel consumption.
Using cruise control can also be advantageous—provided it's safe to use. It allows you to maintain that smooth, constant speed, taking advantage of the variable speed limits to avoid unnecessary acceleration and braking.
Navigating hard shoulder running
On the M1, during peak periods, the hard shoulder may be opened as an additional lane. Here, being alert is essential. Keep an eye on signage to know when it's in use. Driving in this lane when permitted helps alleviate congestion, supporting smoother traffic flow and better fuel economy.
Staying aware of any changes in lane status is crucial. Missing a change from hard shoulder to standard use could lead to unnecessary slowing down, which isn’t good for fuel efficiency.
Avoiding congestion and planning routes
To avoid the worst congestion on the M25, utilise real-time traffic data. FuelRoute’s tools can be exceptionally useful, providing insights on peak times and optimal routes to sidestep the traffic.
If you plan your trip wisely, you can steer clear of the worst delays—early mornings or late evenings tend to be quieter. Less time spent in traffic means fewer fuel stops.
The future of smart motorways and fuel saving
The UK government plans to expand smart motorway systems, which should create more opportunities for fuel savings. As these expansions occur, it’s worth monitoring how they may benefit you in the long run.
Driver adaptation is another factor. The more familiar we become with these systems, the better we can leverage their features for efficient driving. The future of smart motorways looks promising for drivers who focus on fuel efficiency.
Ready to hit the road? Keep these tips in mind and visit our fuel finder or the Route Fuel Planner for more tools to enhance your journeys.
Fuel price data context is derived from the UK Government Fuel Finder Scheme, licensed under the Open Government Licence v3.0.