How did the woman feel about the show?

M: I have never seen such an interesting show. I hope you enjoyed it as much as I did.
W: I must admit that I felt sleepy during the two hours.

M: You Americans are funny. It seems as if you are married to your cars.
W: Yeah , I guess that’ s true. The country is becoming one big highway. I was reading that there are about 4 million miles of roads and highways in this country now.