the interstate highway system

highway - highway bridge
@siaosong (165)
United States
June 29, 2010 12:34pm CST
Now everyone in USA is enjoying the interstate highway system. It represents the freedom and mobility in America. Several days ago, I watched a documentory at histroy channel named "America: The story of us". This is really helpful to know something about the highway system. If you like it, you can google it.
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