In both of these categories, both on-road and off-road vehicles are available.

In the past decade, advances in "on-road" vehicles have made their suspension as adjustable as many full scale race cars, today.

Possession and use of leaded gasoline in a regular on-road vehicle now carries a maximum $10,000 fine in the US.

We know that on-road vehicles produce 18 percent of carbon emissions from this city.

From January 1, 1996, the Clean Air Act banned the sale of leaded fuel for use in on-road vehicles.

This was followed by the reduction of sulphur in diesel fuel sold for use in on-road vehicles after 31 August 2006.

Some are even built for and used as on-road vehicles.

Numerous states have emissions-testing programs to limit pollution from on-road vehicles, such as cars and light-duty trucks.

In the U.S., 190,000 on-road vehicles use propane, and 450,000 forklifts use it for power.

There are plans for heavy on-road vehicles to pay from 1 July 2014.