Three in four Americans agree that cars and trucks are a leading source of carbon pollution in the U.S., and a new poll by the Natural Resources Defense Council (NRDC) shows that respondents of all political views “overwhelmingly” endorse two Obama Administration initiatives to "put the brakes on" that climate pollutant, according to the non-profit environmental organization. The administration is pushing for cleaner cars and trucks that use less fuel and for clean transportation planning, which could usher in safe bikeways, pedestrian walkways and public transit, NRDC suggests.

NRDC’s poll finds that 77 percent of Americans think “cars and trucks contribute to the problem of air pollution” a great deal or somewhat. Additionally, 95 percent of Americans want automakers to keep improving fuel economy for cars and trucks. And 79 percent want the government to keep increasing fuel efficiency standards.  

NRDC also released data ranking the states by their carbon pollution from transportation—which would be affected by the national clean transportation goals.

Of the top 20 worst emitters, seven states—California, Florida, New Jersey, Georgia, Tennessee and Virginia—generate more than 40 percent of their carbon pollution from transportation; on a national average, transportation accounts for about one-third of carbon pollution.

Also, the U.S. Department of Transportation has indicated it may issue standards this year requiring transportation planning agencies to start identifying, and then find ways to reduce, the climate and carbon pollution from projects in their transportation plans.

Indeed, California just last month issued its Sustainable Freight Action Plan, with a goal to transition to zero emission technologies.

NRDC’s poll finds that 78 percent of Americans agree that “state transportation agencies should take vehicle-related carbon pollution and climate change into account when developing transportation plans, and also seek ways to reduce that pollution.” This view is held by 92 percent of Democrats, 79 percent of Independents, and nearly two out of three (64 percent) of Republicans.

“Our poll shows Americans have just two words to say about clean transportation: ‘Floor it,’” said Pete Altman, director of Federal Campaigns at NRDC. “The Obama administration is on the right track to deliver cleaner transportation and we must resist attempts by automakers to weaken our fuel economy standards. In fact, we need to make our cars and trucks even more efficient. And we should modernize the way we plan and build the transportation systems of the future. President Obama has an opportunity, by delivering strong results, to cement a climate legacy as firmly grounded in transportation as it has been in the power sector.”

In 2012, Obama issued landmark standards for 54.5 miles-per-gallon by 2025. The administration also has implemented the first ever medium- and heavy-duty vehicle fuel efficiency standards, setting targets for 2014 and 2017 model-year trucks. A second round of greenhouse gas (GHG) regulations, looking ahead to 2027, is due to published by the Environmental Protection Agency this summer.

Currently, the roughly 400 state and municipal transportation agencies across the country that receive federal transportation funds are required to identify transportation needs, address issues like safety, and set priorities for transportation projects and budgets.  

If Transportation Secretary Anthony Foxx brings forth a new national standard this year, those planning agencies would begin to take into account carbon pollution and climate impacts, which could shift their transportation plans toward reducing climate change, traffic congestion and harmful air pollution by expanding clean transportation options.

A public comment period on the possible national standard ends August 20.

But the changes can’t come soon enough for some groups.