This document summarizes key federal legislation regarding public involvement in transportation planning. It outlines laws such as the Civil Rights Act of 1964, Americans with Disabilities Act of 1990, Transportation Equity Act for the 21st Century, and Safe, Accountable, Flexible, Efficient Transportation Equity Act that require state and local transportation agencies to seek input from the public, including traditionally underserved groups, throughout the transportation planning process. It also discusses Executive Orders that mandate agencies improve access and outreach to minority populations, low-income communities, and those with limited English proficiency.