Giving directions to the airport

— To get to the airport, should I take Interstate 12 south to Highway 620?
— Hmm. At this time of day, it'll probably be faster to take State Route 89, then head east on 620 to the airport exit.
— I see. Then how do I get from here to State Route 89?
— Head east on First Avenue, then turn left on Fir Street. Go one block on Fir Street and turn right. You'll see a sign saying "south 89."