TRBs Airport Cooperative Research Program (ACRP) Report 4: Ground Access to Major Airports by Public Transportation examines key elements associated with the creation of a six-step market-based strategy for improving the quality of public mode services at U.S. airports. The report also addresses the context for public transportation to major airports, explores the attributes of successful airport ground access systems, presents an airport by airport summary of air traveler ground access mode-share by public transportation services, and more.

Examines legal, financial, institutional, technical, jurisdictional and other factors affecting public transportation to airports.

The report presents the results of the second phase of a two-part research effort. The results of the first phase of the research were published as Transit Cooperative Research Program (TCRP) Report 62: "Improving Public Transportation Access to Large Airports." The two reports provide considerable information and practical guidance.

TRB's Airport Cooperative Research Program (ACRP) Report 70: Guidebook for Implementing Intelligent Transportation Systems Elements to Improve Airport Traveler Access Information provides descriptions, component details, and examples of how airport ground access information can be disseminated using various intelligent transportation systems (ITS) technologies. The guidebook contains tables to help airport operators determine the applicability of certain ITS strategies based on airport operational needs and airport size. The printed version of the report includes an interactive CD-ROM designed to help explore and evaluate the information needs of various airport traveler market segments and to identify ITS technologies that best meet the needs of the airport user. The CD-ROM also contains a decision support tool that allows users to identify appropriate methods of delivering airport traveler information based on the airport traveler market segment.

Greening Airports considers the “greening”, i.e., more sustainable development, of the entire air transport system – airports, air traffic control, and airlines – that could be achieved by the development and implementation of advanced operations and technologies. A broad overview of the general concept is given at the start of Greening Airports, which then goes on to provide a system for monitoring and assessing the level of greening of both the air transport system and individual airports. These are followed by analysis and modelling of the potential effects of particular advanced operations and technologies on the greening of airports and their local airspace. These include: the development of a large airport into a multimodal transport node by connecting it to a high speed rail network; the use of operations supported by new and existing air traffic control technologies to increase landing capacity of existing runways; the use of liquid hydrogen as a commercial aviation fuel; and the improvement of airport ground accessibility by a light rail rapid transit system. Greening Airports is written for researchers, planners, operators and policy makers in air transport.