Is Orvieto worth it?

Don't drive in central Rome: almost every headline sight is inside a camera-enforced ZTL, traffic is heavy, and the metro, trams, buses and walking are faster. A car only makes sense for the Appian Way catacombs, Ostia Antica and Tivoli (Villa Adriana, Villa d'Este). Park in a garage outside the ZTL, or at your hotel if it registers your plate.

• ZTL Centro Storico (historic centre). Closed to unauthorised cars Mon–Fri 6:30–18:00 and Sat 14:00–18:00 (not on public holidays). Night ZTL Fri and Sat 23:00–03:00 (not on holidays, off in August). Covers the Pantheon, Navona, Trevi, Campo de' Fiori, the Ghetto, Monti and Piazza Venezia. Camera gates (varchi) record every plate, and a fine is mailed for each unauthorised entry. With a rental car it reaches you through the rental company, which usually adds a handling fee. Taxis, NCC cars and disabled-badge holders are exempt. Motorbikes and mopeds may enter freely (except the Tridente). romamobilita.it
• ZTL Tridente (Piazza del Popolo – Spanish Steps – Via del Corso). Closed to unauthorised cars and also motorbikes/mopeds Mon–Fri 6:30–19:00 and Sat 10:00–19:00 (not on holidays). romamobilita.it
• ZTL Trastevere. Day: Mon–Sat 6:30–10:00 (not on holidays). Night: Fri and Sat 21:30–03:00, plus Wed and Thu from May to October (off in August). 30 km/h limit. romamobilita.it
• Night ZTLs San Lorenzo and Testaccio. San Lorenzo: Fri–Sat 21:30–03:00 (plus Wed–Thu May–October). Testaccio: Fri–Sat 23:00–03:00. Neither runs in August. romamobilita.it
• ZTL hours summary. Official overview: Centro Mon–Fri 6:30–18:00 and Sat 14:00–18:00; Tridente Mon–Fri 6:30–19:00 and Sat 10:00–19:00; Trastevere Mon–Sat 6:30–10:00; night ZTLs as above. romamobilita.it