The Transportation Research Board's National Cooperative Highway Research Program (NCHRP) Synthesis 311: Performance Measures of Operational Effectiveness for Highway Segments and Systems examines the use of performance measures for the monitoring and operational management of highway segments and systems.

Special edition of the Federal Register, containing a codification of documents of general applicability and future effect ... with ancillaries.

Transportation conformity is required under the Clean Air Act (CAA) Section 176(c) to ensure that Federally-supported transportation activities are consistent with (“conform to”) the purpose of a State Implementation Plan (SIP). Transportation conformity establishes the framework for improving air quality to protect public health and the environment. Conformity to the purpose of the SIP means Federal Highway Administration (FHWA) and Federal Transit Administration (FTA) funding and approvals are given to highway and transit activities that will not cause new air quality violations, worsen existing air quality violations, or delay timely attainment of the relevant air quality standard, or any interim milestone. This Guide was prepared to help State and local officials understand transportation conformity and how conformity requirements relate to transportation investments in their communities. Specifically, the implications of conformity on metropolitan transportation plans, transportation improvement programs (TIPs), and transportation projects are discussed. The Guide provides overview information on the major elements of the conformity process and provides answers to basic questions. Several exhibits are included in the Guide to illustrate key elements of the conformity process. Appendices are also included that discuss the health effects of pollutants, options to reduce on-road mobile source emissions, and resource agency contacts.

"The Nebraska Department of Roads (NDOR) has coordinated with the Federal Highway Administration (FHWA) and the Federal Transit Administration (FTA) to document procedures for developing the Nebraska Statewide Transportation Improvement Program (STIP). The three parties will review this document for consistency with laws, regulations and best practices at least biannually but more frequently . . . . The STIP is a four-year listing of projects for which Federal-aid funding under Title 23 (Federal Highway Funding) and Title 49 (Federal Transit Assistance) of the United States Code is proposed. The STIP is a programming tool that is approved on a yearly basis. All projects included in the STIP are consistent with the Nebraska Long Range Transportation Plan and the Nebraska Highway Needs Study" (page 1).