Most of all, it requires extra collection crews and trucks.

Although heavy mortars require trucks or tracked mortar carriers to move them, they are still much lighter than field artillery pieces.

For some time, the United States has required commercial trucks to register their mileage and routes.

We would require special trucks and we would have to build roads to get them in and out.

Democrats have sought to press their political advantage by introducing bills that would require light trucks to achieve the same gas mileage as cars.

Mr. Keany said he was most concerned about large deliveries that would require trucks.

The new rules are part of long-term plan, begun in the previous administration, to require diesel trucks and buses to reduce emissions by 90% by 2007.

Would require diesel-powered trucks to undergo an annual emissions inspection.

Democrats and moderate Republicans hope to amend that bill on the floor with a provision that would require light trucks to begin achieving the same gas mileage as cars.

The agency also wants to require new cars and trucks to have warning labels that are easier for motorists to see inside vehicles.