National Neighborhood Data Archive (NaNDA): Primary and Secondary Roads by Census Tract and ZIP Code Tabulation Area, United States, 2010 and 2020

This collection contains measures of primary and secondary roads (highways and main arteries) per United States census tract and per United States ZIP code tabulation area (ZCTA) in 2010 and 2020. These measures may be used as a proxy for heavy traffic, high traffic speeds, and impediments to walking or biking. Variables include: counts of primary, secondary, and all streets per tract and per ZCTA; total length of primary, secondary, and all streets per tract and per ZCTA; ratio of primary and/or secondary road counts to all roads; and ratio of length of primary/secondary roads to all streets.

本数据集收录了2010年和2020年美国人口普查区以及美国邮政编码统计区（ZCTA）内主要道路和次要道路（高速公路和主要干道）的测量数据。这些测量数据可作为交通流量大、车速快以及步行或骑行障碍的代理指标。变量包括：每个普查区和每个ZCTA内主要道路、次要道路及所有道路的数量；每个普查区和每个ZCTA内主要道路、次要道路及所有道路的总长度；主要道路和/或次要道路数量与所有道路数量的比率；以及主要/次要道路长度与所有道路长度的比率。