How were highways built given the requirements for evaluation in Civil Rights Act and NEPA of the "social and economic impacts of central city and its inhabitants" which this highway only policy caused? While most highways in urban centers were planned prior to these policies - "federal review and approval of many of these same projects occurred much later and was subject to some or all of the impact disclosure requirements. Yet these impacts, if they were ever considered by state highway departments during project reviews, were generally not disclosed in Title VI reviews, or in Environmental Impact Statements, or at public hearings. A significant aspect of these reviews has been the tendency of Federal Highway Administration (FHWA) to base approvals of state plans on assurances of compliance even in the absence of corroborating evidence"Federal Urban Transportation Policy and the Highway Planning Process in Metropolitan Areas"