Vocabulary. Canadian, Mexican.

　　America's national road system makes it possible to drive coast to coast.

　　From the Atlantic Ocean in the east to the Pacific Ocean in the west is a distance of more than 4,000 kilometers.

　　Or you could drive more than 2,000 kilometers and go from the Canadian border south to the Mexican border.

　　The highway system has made it possible for people to work in a city and live outside it.

　　And it has made it possible for people to travel easily and quickly from one part of the country to another.