ACRP Legal Research Digest 21
February 01, 2024
U.S. airports that receive assistance from the federal government are required to comply with a number of obligations imposed by federal law. The TRB Airport Cooperative Research Program's ACRP Legal Research Digest 21: Compilation of DOT and FAA Airport Legal Determinations and Opinion Letters as of December 31, 2022 covers legal matters that include the reasonableness of contractual terms,...
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ACRP Research Report 238
December 22, 2022
Developments in unmanned aircraft systems (UAS) technology and the seemingly endless applications of this technology offer society a broad spectrum of enhancements and solutions to many problems. The TRB Airport Cooperative Research Program's ACRP Research Report 238: Airfield Design for Large Unmanned Aircraft Systems—A Guide provides a fundamental understanding of large UAS (L-UAS) and thei...
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ACRP Web-Only Document 54
September 16, 2022
An important operational characteristic of an airport is the length of its longest runway. The longest runway determines the types of aircraft that can use the airport and dictates the operational limitations at the airport. The TRB Airport Cooperative Research Program's ACRP Web-Only Document 54: Development of a Small Aircraft Runway Length Analysis Tool provides a user-friendly computer tool to...
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NCHRP Web-Only Document 340
September 02, 2022
Dynamic curbside management has been the purview of cities, with much of the relevant research and guidance directed toward local transportation agencies. However, state departments of transportation, metropolitan planning organizations, and other regional agencies can be important partners for these local entities because, in many cases, roadways and other curb zone elements are part of the regio...
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March 31, 2022
The November-December 2021 issue of TR News —with a cover feature on collaboration and innovation at the MnROAD Research Facility—is available in full online. Other feature articles in the issue include Airport Cooperative Research Program guidance on best design practices for service animal relief areas, worship spaces, lactation areas, and more; developing the transportation workforce; and infra...
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NCHRP Web-Only Document 308
March 14, 2022
Many technical and institutional issues related to estimating and reducing greenhouse gas emissions (GHGs) lie across a wide spectrum of the activities undertaken by state departments of transportation (DOTs). The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 308: Methods for State DOTs to Reduce Greenhouse Gas Emissions from the Transportation Sector documents the re...
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NCHRP Research Report 986
March 08, 2022
The AASHTO Guide for Enterprise Risk Management , published in 2016, defines enterprise risk management as “the formal and systematic effort to control uncertainty and variability on an organization’s strategic objectives by managing risks at all levels of the organization.” The TRB National Cooperative Highway Research Program's NCHRP Research Report 986: Implementation of the AASHTO Guide for En...
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January 28, 2022
The September-October 2021 issue of TR News —with a cover feature on what the transportation industry learned from 9/11—is available in full online. Other feature articles in the issue focus on how, since the terrorist attacks of September 11, 2001 (9/11), transportation has broadened its role to include response and operations—from traffic incident management as a multiagency function to av...
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January 03, 2022
The 2021 Annual Report summarizes TRB’s accomplishments in each of its major program areas and how TRB has served the nation and the global transportation professional community throughout the year. TRB provides leadership in transportation improvements and innovation through trusted, timely, impartial, and evidence-based information exchange, research, and advice regarding all modes of transporta...
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December 30, 2021
ACRP’s 2021 Annual Report of Progress describes the TRB Airport Cooperative Research Program’s activities and accomplishments and how they encourage collaboration to address emerging challenges and foster professional networking across miles and generations. By presenting program metrics and practitioner feedback, the report describes ACRP’s highlights and accomplishments. Since its establishment ...
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ACRP Research Report 235
November 22, 2021
Airport user surveys have traditionally been used to obtain information for facility planning. More recently, however, surveys are being used to measure satisfaction as a way to identify actions that could improve the customer experience and increase non-aeronautical revenues, particularly those from passenger terminal concessions. The TRB Airport Cooperative Research Program's ACRP Research Repor...
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November 15, 2021
The July-August 2021 issue of TR News —with a cover feature on research needs for the marine transportation system of the future—is available in full online. Other feature articles in the issue include members of the Marine Board and TRB’s Marine Group standing committees investigating critically important topics for innovation and research in, and transformation of, the marine transportatio...
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TRB Special Report 341
September 15, 2021
There appear to be, in this preliminary assessment, no formidable issues that present design and engineering challenges for installing in-cabin wheelchair securement systems in airplanes. While equipping enough airplanes with securement systems to provide meaningful levels of airline service would require substantial effort, the types of cabin modifications required to provide the needed space and...
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ACRP Research Report 220
September 15, 2021
Airports worldwide are setting aggressive zero- or low-emissions targets. To meet these targets, airports are deploying new strategies, adopting innovative financing mechanisms, and harnessing the collective influence of voluntary emissions and reporting programs. In tandem, new and affordable zero- or low-emissions technologies are rapidly becoming available at airports. The TRB Airport Cooperati...
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August 11, 2021
The March - April 2021 issue of TR News —with a cover feature on TRB's 100th Annual Meeting—is available in full online. Other articles in the issue explore mobility and human trafficking, near-road air quality, and how to make safer roadway crossings for small wildlife. This is Issue 332. To subscribe to TR News, sign up through MyTRB.org. Subscription rates include postage. Subscribe based...
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TRB Special Report 340
August 05, 2021
Significant progress has been made over the last decade in integrating resilience criteria into transportation decision-making. A compelling case remains for investing in making transportation projects more resilient in the face of increasing and intensifying storms, floods, droughts, and other natural hazards that are combining with sea-level rise, new temperature and precipitation norms, and oth...
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July 21, 2021
The May - June 2021 issue of TR News —with a cover feature on diversity, equity, and inclusion (DE&I) in the transportation profession—is available in full online. Other articles in the issue highlight TRB’s initiatives addressing DE&I, along with programs within the larger transportation community, from the federal government to states to universities. This is Issue 333. To subscribe to T...
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July 21, 2021
TRB’s Airport Cooperative Research Program (ACRP) Report 51: Risk Assessment Method to Support Modification of Airfield Separation Standards is intended to be used to support requests for modification of standards in those circumstances where the design criteria for separations between taxiways/taxilanes and other taxiways/taxilanes and fixed or movable objects as well as separations between taxiw...
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Racial Equity Addendum to Critical Issues in Transportation
July 15, 2021
Racism has been overt in transportation. For example, the segregation of races on intercity trains led to the infamous 1896 Plessy v. Ferguson “separate but equal” Supreme Court doctrine that stood for more than half a century. While many discriminatory policies have been reversed by the courts and in constitutional amendments, their impacts on society have not been fully remedied and persist. TRB...
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TRB Special Report 339
June 17, 2021
Liquefied natural gas (LNG) has not been transported to any significant degree by freight railroads in the United States. When the Further Consolidated Appropriations Act of 2020 was enacted, it directed the Pipeline and Hazardous Materials Safety Administration (PHMSA) to enter into an agreement with the National Academies of Sciences, Engineering, and Medicine (NASEM) to convene a committee of i...
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ACRP Research Report 231
June 17, 2021
Today’s airports have become much more than transportation hubs. They are increasingly becoming places where people dine, shop, relax, work, and interact. This expanded role comes with challenges as airports try to understand and address the needs of their diverse customer base. The TRB Airport Cooperative Research Program's ACRP Research Report 231: Evaluating the Traveler's Perspective to Improv...
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Transportation Research Circular E-C270
May 05, 2021
There is a widespread and heightened interest in both taking a hard look at where inequity exists and how to identify ways to address it with actionable solutions. The TRB National Cooperative Highway Research Program's Transportation Research Circular E-C270: Opportunities for Research on Transportation and Equity presents the outcomes of a TRB brainstorming session put forth as a challenge from ...
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ACRP Research Report 228
April 29, 2021
Awareness of the vulnerability of the country’s existing electrical system has increased with the frequency of short-term blackouts and long-term utility outages. Power outages impact airport operations by causing flight delays, extended layovers, disruptions in cargo operations, loss of revenue, and limitations in airports’ ability to provide emergency support. The TRB Airport Cooperative Researc...
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ACRP Research Report 227
April 26, 2021
A public-private partnership (P3) can be a dynamic tool to help infrastructure owners achieve a range of objectives on projects, such as incorporating lifecycle project costs into decision-making, benefiting from innovation in design and construction techniques, or sharing certain performance risks. The TRB Airport Cooperative Research Program's ACRP Research Report 227: Evaluating and Implementin...
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NCHRP Research Report 963/TCRP Research Report 225
April 12, 2021
Understanding pandemics, their impacts to transportation, and potential effective response has become more important, not only for the response to COVID-19, but also if, as the World Health Organization warns, we are now “living in a time of viruses.” TRB's National Cooperative Highway Research Program and Transit Cooperative Research Program have jointly issued NCHRP Research Report 963/TCR...
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NCHRP Research Report 963/TCRP Research Report 225
April 12, 2021
Understanding pandemics, their impacts to transportation, and potential effective response has become more important, not only for the response to COVID-19, but also if, as the World Health Organization warns, we are now “living in a time of viruses.” TRB's National Cooperative Highway Research Program and Transit Cooperative Research Program have jointly issued NCHRP Research Report 963/TCR...
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April 08, 2021
The September–October 2020 issue of TRB's magazine is now available in full online. Issue 330 includes the cover story, “Recycled Material Web Map,” and features articles on topics including incorporating resiliency into freight mobility, living with transformational technologies, and pollution-reducing highway barriers. TR News is TRB's bimonthly magazine featuring timely articles on innovative a...
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ACRP Research Report 230
April 07, 2021
Airports and their support industries have changed significantly over the past several decades. It is imperative that academic programs continue to evolve with these changes to better prepare the next generation of airport industry professionals. The TRB Airport Cooperative Research Program's ACRP Research Report 230: Enhancing Academic Programs to Prepare Future Airport Industry Professionals pro...
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ACRP Web-Only Document 51
April 07, 2021
Federal Aviation Administration (FAA) regulations require the licensing of spaceports and launch vehicles, which includes the assessment of environmental impacts. The TRB Airport Cooperative Research Program’s ACRP Web-Only Document 51: Commercial Space Vehicle Emissions Modeling presents a user-friendly tool for practitioners to estimate the emissions associated with commercial space vehicle acti...
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ACRP Research Report 229
March 04, 2021
Airport collaborative decision making (ACDM) is a process in which the stakeholders of operations—airport operators, the air traffic control tower staff, flight operators, ground handlers, fixed-base operators, and others—share information to improve policies, planning, real-time coordination, and decisions regarding operations. The TRB Airport Cooperative Research Program's ACRP Research Report 2...
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