This bill, titled the Streamline Transit Projects Act, aims to accelerate transit project development by allowing certain eligible transit agencies to assume responsibilities related to the National Environmental Policy Act (NEPA). An "eligible recipient" is defined as a direct recipient of funds in an urbanized area with over 200,000 people, demonstrating the necessary legal, technical, and financial capacity. These agencies can then determine whether specific designated activities qualify for **categorical exclusions**, bypassing more extensive environmental assessments or impact statements, under criteria established by the Secretary of Transportation. Beyond NEPA categorical exclusions, the Secretary may also assign, and eligible recipients may assume, responsibilities for environmental review and consultation under other Federal laws, with the exception of government-to-government consultations with Indian Tribes. When an agency assumes these responsibilities, it becomes **solely responsible and liable** for complying with and carrying out those laws. The Secretary and the eligible recipient must enter into a **Memorandum of Understanding (MOU)**, which outlines the assigned responsibilities, terms, and conditions, including the recipient's consent to Federal court jurisdiction. MOUs typically have a term of 3 years, or 5 years for experienced recipients, and are renewable, with the Secretary monitoring compliance and performance. The Secretary can terminate an assignment for non-compliance after a corrective action period, and recipients can also terminate with notice. Agencies assuming these duties are deemed Federal agencies for the purpose of exercising those responsibilities and can use project funds for associated legal fees.