A retractable axle or lift axle is a way in which the axle can be raised so that its tyres aren’t touching the road surface. This improves fuel economy, and reduces maintenance and tyre wear, although it increases road wear.…
Trucks that are used for longer journeys usually have sleeper cabs or sleeper berths so they are more convenient for the driver; the driver doesn’t have to find and pay for accommodation for the night during their mandatory rest periods.…