Census Urban Adjusted (2010)

The Adjusted Census Urban Boundary (ACUB) is an area that determines the official urban designation for a road. The ACUB is subject to Federal Highway Administration (FHWA) approval. Once approved, it is used to declare a road urban for federal Highway Performance Monitoring System (HPMS) and state Act 51 urban county road designation. Any road within or on the ACUB border is urban. For roads on the ACUB border, both sides of the road are considered urban. The federal FAST Act Transportation Performance Measures reference urbanized area roads; this means the urbanized ACUB roads. The ACUB roads are reported in the annual HPMS report to FHWA. Any road outside an ACUB is considered a rural road for state and federal transportation purposes.调整普查城市边界（Adjusted Census Urban Boundary, ACUB）是用于认定单条道路官方城市属性的地理区域。该边界需经美国联邦公路管理局（Federal Highway Administration, FHWA）审批通过。获批后，该边界将用于在联邦公路性能监测系统（Highway Performance Monitoring System, HPMS）中认定城市道路，同时用于依据州级第51号法案完成城市县级道路的属性认定。任何位于ACUB范围内或边界线上的道路均被视为城市道路；对于ACUB边界线上的道路，其两侧均视作城市道路。联邦《美国地面交通修复法案》（FAST Act）所规定的交通绩效指标中提及的城市化区域道路，即指符合ACUB认定标准的城市道路。经ACUB认定的城市道路需在年度HPMS报告中上报至FHWA。任何不在ACUB范围内的道路，在州级与联邦交通管理范畴内均被归类为乡村道路。