Truckers can now use small auxiliary fuel tanks on trailers, but only when stopped

The US Department of Transportation proposes allowing small auxiliary fuel tanks on truck trailers. These tanks can only be used when the truck is not moving, and they cannot power the main engine.

This small change makes it easier for truckers to power auxiliary equipment, like refrigeration units, without running the main engine. It could reduce idling time and fuel consumption for specific tasks. The change comes from a request by trailer manufacturers, suggesting a practical need in the industry.