Several have even removed meters altogether and now require motorists to pay by mobile phone.

While a few states require older motorists to take added tests, most do not.

Would have required bus drivers and motorists involved in accidents with buses to submit to a breath test.

These plans included a congestion charge which would have required motorists to pay a fee to enter the city at certain times of the day.

By the mid-1940s, most states had traffic laws requiring motorists to stop for school buses while children were loading or unloading.

Another factor is a law requiring motorists to buy coverage for unlimited medical expenses arising from an accident.

The researchers estimated that if all 50 states had laws requiring motorists to buckle up, about 500 more lives would have been saved.

Scrapping the regulation requiring motorists to hold a paper counterpart to their driving licence by 2015 - saving drivers up to £8m.

It provides a forced spiralling flow of traffic, thus requiring motorists to choose their direction before entering the roundabout.

Voters defeated by 61-39 percent a measure calling for the nation's strictest statewide anti-smoking law and rejected an ordinance requiring motorists to use seat belts.