National Transportation Atlas Database (NTAD): National Transportation Analysis Regions (NTAR) 1996-Present Datasets
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下载链接：
https://rosap.ntl.bts.gov/view/dot/71901
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资源简介：
National Transportation Analysis Regions (NTAR) divide the U.S. into 89 areas that delineate the functional geography transportation demand.
提供机构：
Bureau of Transportation Statistics
创建时间：
2023-10-02
