DOT Guidelines
Visit your state's Department of Transportation website for the most up-to-date information.
ALABAMA
Department of Transportation
ALASKA
Department of Transportation
ARIZONA
Department of Transportation
ARKANSAS
Highway and Transportation Department (AHTD)
CALIFORNIA
Department of Transportation
PATH: Partners for Advanced Transit and Highways
Division of Traffic Operations
Mass Transportation Program
COLORADO
Department of Transportation
CONNECTICUT
Department of Transportation
DELAWARE
Department of Transportation
FLORIDA
Department of Transportation
Department of Highway Safety and Motor Vehicles
GEORGIA
Department of Transportation
HAWAII
Department of Transportation
Oahu Metropolitan Planning Organization
IDAHO
Idaho Transportation Department
ILLINOIS
Department of Transportation
INDIANA
Department of Transportation
IOWA
Department of Transportation
Governor's Traffic Safety Bureau
KANSAS
Department of Transportation
KENTUCKY
Transportation Cabinet
LOUISIANA
Department of Transportation & Development
MAINE
Department of Transportation
MARYLAND
Department of Transportation
State Highway Administration
MASSACHUSETTS
Department of Transportation
MICHIGAN
Department of Transportation
MINNESOTA
Department of Transportation
MISSISSIPPI
Department of Transportation
MISSOURI
Department of Transportation
MONTANA
Department of Transportation
NEBRASKA
Nebraska Department of Roads
NEVADA
Department of Transportation
NEW HAMPSHIRE
Department of Transportation
NEW JERSEY
Department of Transportation
Port Authority of New York and New Jersey
NEW MEXICO
Highway and Transportation Departmen
NEW YORK
New York State Department of Transportation
New York Metropolitan Transportation Council
Port Authority of New York and New Jersey
Thruway Authority, New York State
NORTH CAROLINA
Department of Transportation
Division of Highways
ITRE: UNC Institute for Transportation
NORTH DAKOTA
Department of Transportation
OHIO
Department of Transportation
OKLAHOMA
Department of Transportation
OREGON
Department of Transportation
PENNSYLVANIA
Department of Transportation
RHODE ISLAND
Department of Transportation
SOUTH CAROLINA
Department of Transportation
SOUTH DAKOTA
Department of Transportation
TENNESSEE
Department of Transportation
TEXAS
Department of Transportation
Center for Transportation Research
Texas A&M Transportation Institute
UTAH
Department of Transportation
VERMONT
Agency of Transportation
VIRGINIA
Department of Transportation
WASHINGTON
Department of Transportation
WEST VIRGINIA
Department of Transportation
WISCONSIN
Department of Transportation
WYOMING
Department of Transportation