The Federal Highway Administration may start considering carbon emissions and other air quality standards when considering how to spend their money, but they are going to need a lot of support and pressure to take action. You can help make this happen by submitting a comment through the following page: https://www.regulations.gov/#!docketDetail;D=FHWA-2013-0054
Just click the blue "Comment Now" button in the middle of the page. You can also read the proposed rule which is right next to it.
