The interstate highway system makes long-distance travel by car fast and convenient. Interstate highways are clearly marked with numbers: odd numbers mark north and south routes and even numbers mark east and west routes. Such toll roads as turnpikes, thruways and parkways are part of the interstate system. The speed limit on all highways is 55 miles per hour unless otherwise posted. Remember that 1 mile=1.6 kilometers.
1.A: We'd better stop and rest pretty soon.
B: OK. I'll look at the map to see exactly where we are.
A: Do you think we'll have any trouble finding a room for the night?
B: I'm sure it'll be easy to find a place.