Highway Safety:
Research Continues on a Variety of Factors That Contribute to Motor Vehicle Crashes
GAO-03-436: Published: Mar 31, 2003. Publicly Released: Apr 30, 2003.
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Nearly 6.3 million motor vehicle crashes occurred in the United States in 2001, or one crash every 5 seconds. On average, a person was injured in these crashes every 10 seconds, and someone was killed every 12 minutes. Since the 1970s, progress has been made in reducing the number of fatalities and injuries on our nation's roads. From 1975 through 2001, fatalities decreased from 44,525 to 42,116, while the rate of fatalities per 100 million vehicle miles traveled decreased from 3.35 to 1.51. However, the decline in fatalities has leveled off in recent years. In the 1970s, Indiana University conducted one of the most significant studies to date on the factors that contribute to motor vehicle crashes. This study examined human, environmental, and vehicle factors that contribute to crashes. As requested, this report provides more recent information from data, experts, and studies about the factors that contribute to motor vehicle crashes and information about major ongoing and planned Department of Transportation research into factors that contribute to crashes.
Many factors combine to produce circumstances that may lead to a motor vehicle crash--there is rarely a single cause of such an event. Three categories of factors contribute to crashes: human factors, roadway environment factors, and vehicle factors. Human factors involve the actions taken by or the condition of the driver of the automobile, including speeding and violating traffic laws, as well as being affected by alcohol or drugs, inattention, decision errors, and age. Roadway environment factors include the design of the roadway, roadside hazards, and roadway conditions. Vehicle factors include any failures that may exist in the automobile or design of the vehicle. Human factors are seen as the most prevalent, according to data, experts, and studies, in contributing to crashes, followed by roadway environment and vehicle factors. Agencies within the Department of Transportation have research projects underway or planned that address the factors that contribute to crashes. For example, the Federal Motor Carrier Safety Administration and the National Highway Traffic Safety Administration are conducting a study on the causes and contributing factors to large truck crashes. In addition, the National Highway Traffic Safety Administration is conducting a 100-Car Naturalistic Driving Study and the Drive Atlanta Study. The 100-Car Naturalistic Driving Study involves collecting data from vehicles equipped with sensors and cameras to obtain better information on crashes and near misses. The Drive Atlanta Study involves collecting data from 1,100 vehicles equipped with data recorders to develop information about how excessive speed contributes to crashes. In addition, the Transportation Research Board has proposed a broad, 6-year, $180 million research program focused on making significant improvements in highway safety. This study, among other things, would involve installing sensors and other data collection devices on over 5,000 vehicles.
Jan 7, 2021
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Aircraft Noise:
Better Information Sharing Could Improve Responses to Washington, D.C. Area Helicopter Noise ConcernsGAO-21-200: Published: Jan 7, 2021. Publicly Released: Jan 7, 2021.
Dec 18, 2020
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Automated Technologies:
DOT Should Take Steps to Ensure Its Workforce Has Skills Needed to Oversee SafetyGAO-21-197: Published: Dec 18, 2020. Publicly Released: Dec 18, 2020.
Dec 17, 2020
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Emergency Responder Safety:
States and DOT Are Implementing Actions to Reduce Roadside CrashesGAO-21-166: Published: Dec 17, 2020. Publicly Released: Dec 17, 2020.
Nov 24, 2020
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Reagan National Airport:
Information on Effects of Federal Statute Limiting Long-Distance FlightsGAO-21-176: Published: Nov 24, 2020. Publicly Released: Nov 24, 2020.
Nov 19, 2020
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Federal-Aid Highways:
States and Local Governments Reported Benefits to Federal Highway Fund Swapping, but Impacts Cannot be Definitively DeterminedGAO-21-88: Published: Oct 20, 2020. Publicly Released: Nov 19, 2020.
Nov 16, 2020
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Aviation Certification:
FAA Needs to Strengthen Its Design Review Process for Small AirplanesGAO-21-85: Published: Nov 16, 2020. Publicly Released: Nov 16, 2020.
Nov 9, 2020
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Aviation Safety:
FAA's Office of Aviation Safety Should Take Additional Actions to Ensure Its Workforce Has Needed SkillsGAO-21-94: Published: Nov 9, 2020. Publicly Released: Nov 9, 2020.
Oct 29, 2020
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Puerto Rico:
Perspectives on the Potential to Expand Air Cargo OperationsGAO-21-21: Published: Oct 29, 2020. Publicly Released: Oct 29, 2020.
Sep 30, 2020
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Supplemental Material For GAO-20-686:
Transit Asset Management: Survey of TAM Program ParticipantsGAO-20-687SP: Published: Sep 30, 2020. Publicly Released: Sep 30, 2020. -
Transit Asset Management:
FTA Should Clarify Performance Data and Develop a Plan to Guide Future Program ImprovementsGAO-20-686: Published: Sep 30, 2020. Publicly Released: Sep 30, 2020.
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