That is backed up by another Department of Transportation study, in 1999, of 500 Mexican trucks caught going deeper into the United States.
The senators cited a Virginia Tech Transportation Institute study that found that truck drivers who texted while driving were 23 times more likely to crash or get into a near-accident than undistracted drivers.
Moreover, a study by the Texas Transportation Institute found that highways with diamond lanes lacking a physical barrier separating them from regular lanes have a 50 percent higher incidence of injury accidents.
FORBES: Diamond Lanes: Another Failed Energy / Environmental Policy
Deron Lovaas, transportation policy director for the Natural Resources Defense Council, said the study "hit the nail on the head in terms of the opportunity" to promote alternative modes of transportation.
Simon Washington, a civil-engineering professor at Queensland University of Technology in Brisbane, Australia, co-wrote a study for the Arizona Department of Transportation in 2005 that cited other work showing that extending yellow-light intervals can reduce red-light running by 50% to 70%.
Obtaining a driver's license was once a ritual of American youth, and yet by 2010, more than 30% of Americans ages 17 to 19 did not possess a driver's license, up sharply from 12.7% in 1983, according to a study by the University of Michigan Transportation Research Institute.
Piloting small aircraft represents the riskiest type of transportation, according to fatality data analyzed for the study.
WSJ: Executive No-Fly Zone? When a CEO's Thrill-Seeking Rattles the Board
Last year, CEOs for Cities released a detailed response to the Texas Transportation Institute (TTI) report, faulting the study for failing to include travel times, an omission that tilts the results in favor of metro regions splayed out.
Another study it cites suggests that a delay in transportation from the South Side to a trauma center "has no impact" (PDF).
"It's a critical piece of infrastructure for the region and also for the Northeast, " said Rich Barone, director of transportation programs for the Regional Plan Association, which is preparing a study of capital needs along the rail corridor.
Highly regarded transportation expert Robert Poole of Reason Foundation recounted the findings of this startling study in congressional testimony this summer.
FORBES: TSA Conflict of Interest Would Come As No Surprise To Adam Smith
The American Federation of Government Employees, a labor union representing 625, 000 federal employees including 40, 000 transportation security officers, would like to see a more comprehensive, independent study focused on TSA employee exposure.
According to a study of the Greater Washington area, for example, per capita transportation emissions in the city were less than the national average, reports Grist.
If all those fantasies become reality, the U.S. could, in theory, meet all of its transportation fuel needs with ethanol by 2050 without adding to today's current cropland, according to an exhaustive study by the National Resources Defense Council, an environmental group based in New York.
In the comparative study of the cost of mass transit, analysts at Mercer selected the most convenient and popular means of transportation between bus and subway in a given city and gauged the price based upon a ride in the city center for one adult, according to the Mercer analysis team.
FORBES: In Pictures: World's Most Expensive Commutes - 2. Tokyo
应用推荐