NAPLES, Italy — Motorists in Naples will be barred from driving downtown for several hours over the next few days under the city’s anti-smog plan.

The ban began Monday and runs through Wednesday in city center areas. Vehicles that are not "eco-friendly" are barred from driving downtown from 3 p.m. to 8 p.m. on all three days.

The ban does not affect public transportation, including taxis and bus service.

U.S. and NATO military and civilians driving vehicles registered with Allied Forces Italy plates also are exempt from the driving ban. U.S. motorists, however, should be prepared to present vehicle registration forms to local authorities.

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