Census Urban Adjusted (2000)

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.调整后人口普查城市边界（Adjusted Census Urban Boundary，ACUB）是用于判定单条道路官方城市属性的划定区域。ACUB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，同时可用于开展州51号法案框架下的城市县道认定工作。凡处于ACUB范围内或边界线上的道路，均被视为城市道路；对于位于ACUB边界线上的道路，其两侧均被认定为城市道路属性。联邦《FAST法案》交通绩效指标所提及的城市化区域道路，即指符合ACUB标准的城市道路。ACUB划定的城市道路需在每年提交给FHWA的HPMS年度报告中进行申报。凡位于ACUB范围之外的道路，在州级与联邦交通管理范畴内均被归类为乡村道路。