The width and value of residential streets

This dataset provides street-level information on width and the
land value of street rights-of-way for 20 of the largest counties in the
United States. Land values are expressed in 2019
prices. It uses OpenStreetMap and tax parcel
data as inputs to a GIS-based process. Substantively, residential street
rights-of-way in the urbanized portion of these counties average 55 ft
wide, far greater than the functional minimum of 16 ft required for
access. The land value of residential streets totals $959 billion in the
urbanized portion of the 20-county sample. In most counties, subdivision
regulations are binding; that is, few developers choose to build streets
that are wider than code requirements, implying that softening
requirements would mean more land devoted to housing and less to
streets.

本数据集提供美国20个最大郡的街道级路权用地（street rights-of-way）宽度与土地价值信息，土地价值以2019年不变价计价。本数据集以开放街道地图（OpenStreetMap）与计税地块数据为输入源，依托基于地理信息系统（Geographic Information System，简称GIS）的处理流程完成构建。从实质层面分析，上述郡建成区范围内的住宅街道路权用地平均宽度为55英尺，远高于通行所需的16英尺功能最低标准。在本次20郡样本的建成区范围内，住宅街道路权用地总价值高达9590亿美元。多数郡的土地细分法规具有强制约束力，即几乎没有开发商会建造超出规范要求宽度的街道，这意味着放宽相关规范要求将使更多土地用于住宅建设，而非街道用地。