Sequentially numbered Interstate (I) highways form the USA network. Roads with numbers ending in 0 cross the country east to west, while those ending in 5 run north to south. Maximum speed limits are 120kph (75mph) on rural Interstates, 105kph (65mph) on urban Interstates and 88kph (55mph) on other roads. In business or residential districts, a limit of 48kph (30mph) applies. Maximum legal alcohol to blood ratio is 0.08%. Passengers must wear seatbelts. Children under the age of five are required to be seated and belted in the back of the car in a child protective seat. Right turn is permitted on red after a complete stop.

The Arizona Automobile Association (tel: 1 800 222 1134; website: www.aaaaz.com) provides insurance and breakdown recovery for members.

Emergency breakdown service:
AAA (tel: 1 800 222 4357/AAA HELP).Routes to the city: Phoenix is intersected by I-10 and Route 60 from the east and west, Route 17 from the north and south. From Phoenix, I-10 goes south to Tucson before turning east. Roads intersect with the 101 loop or the 202 loop.

Coach services: Greyhound (tel: (602) 389 4200 or 1 800 231 2222; website: www.greyhound.com) has a 24-hour coach station at 2115 East Buckeye.