Public Citizen v. Department of Transportation

Petitioners 1 challenge the Department of Transportation’s failure to conduct the requisite environmental analyses prior to promulgating three regulations, the combined effect of which will permit Mexico-domiciled motor carriers to operate within the' United States beyond the current limited border zones, thus fulfilling the United States’ obligations under the North American Free Trade Agreement. Upon completion of a preliminary Environmental Assessment for two of the three regulations, the Department of Transportation decided that there was no need for further environmental analysis. Petitioners claim that the Department of Transportation’s failure to prepare an in-depth Environmental Impact Statement for all three regulations violates the National Environmental Policy Act of 1969, and that its further failure to conduct a “conformity determination” to ensure that the regulations do not disrupt applicable State Implementation Plans violates the Clean Air Act. Although we agree with the importance of the United States’ compliance with its treaty obligations with its southern neighbor, Mexico, such compliance cannot come at the cost of violating United States law. Because…