Q. Find Federal Transportation Regulations
You can access title 49 (Transportation) of the Code of Federal Regulations at http://www.gpo.gov/fdsys/browse/collectionCfr.action?collectionCode=CFR. Transportation regulations can also be found in Title 14 (Aviation) Title 23 (Highways) and Title 46 (shipping).
Print copies of the CFR can be ordered from the US GPO online bookstore, and other commercial vendors: http://bookstore.gpo.gov/index.jsp
Title 49 is published in 7 volumes, which must be purchased individually. You can also purchase a subscription, so that you receive the new edition as it is released. http://bookstore.gpo.gov/baskets/cfr-listing.jsp