Motorway congestion caused by speed differences between trucks and cars creates dangerous "rolling roadblocks" that slow traffic, increase accidents, and waste fuel. The problem worsens in busy corridors with many trucks, hilly areas where trucks struggle to maintain speed, or stretches lacking passing lanes. It affects all road users, from frustrated drivers to logistics companies facing delivery delays.

The Underpass Solution

One approach could involve trucks that automatically make space for passing cars by raising their chassis. When sensors detect approaching vehicles, the truck might temporarily lift its rear section just enough for cars to pass underneath safely, then lower back to normal height. Key components could include:

• Computer-controlled air suspension that adjusts height precisely
• 360-degree sensors to detect nearby vehicles' speed and position
• Automated safety checks that prevent raising on curves or bad roads
• Driver controls to override the system when needed

Making It Work for Everyone

For trucking companies, the system could pay for itself through fuel savings from smoother traffic flow and possible insurance discounts. Highway authorities might support it as a cheaper alternative to building extra lanes. Implementation could start with a trial phase testing prototypes on private tracks, followed by equipping a small fleet operating on selected routes to collect real-world data before wider rollout.

Compared to Current Options

Unlike expensive solutions like adding more lanes or truck-only roads, this approach uses existing infrastructure more efficiently. It differs from truck platooning systems by directly helping passenger vehicles rather than just coordinating between trucks. While traditional speed limiters simply cap truck speeds, this actively creates passing opportunities without requiring cars to slow down.

Initial challenges would include ensuring public comfort with the concept and developing failsafe mechanisms, but controlled testing could address these concerns. The technology might first appear in new truck models before becoming standard equipment or offering retrofits for existing fleets.