• Alabama

    Checkpoints are conducted throughout the year. Their legality is upheld under federal Constitution.

  • Alaska

    Sobriety checkpoints are not conducted. They are not authorized by the state.

  • Arizona

    Checkpoints are conducted at least once per month. Their legality is upheld under federal Constitution.

  • Arkansas

    Checkpoints are conducted weekly. Their legality is upheld under state and federal Constitution.

  • California

    2,500 or more checkpoints are conducted annually. Their legality is upheld under state and federal Constitution.

  • Colorado

    Checkpoints are conducted once or twice a month. Their legality is upheld under state and federal Constitution. 

  • Connecticut

    Checkpoints are conducted. Their legality is upheld under state Constitution.

  • Delaware

    Checkpoints are conducted monthly from January to June and weekly from July to December. Their legality is upheld under state law and federal Constitution.

  • District of Columbia

    Checkpoints are conducted once or twice a month. Their legality is upheld under federal Constitution.

  • Florida

    Between 15 and 20 checkpoints are conducted each month. Their legality is upheld under federal Constitution.

  • Georgia

    Checkpoints are conducted weekly. Their legality is upheld under state and federal Constitution.

  • Hawaii

    Checkpoints are conducted weekly. Their legality is authorized by statute.

  • Idaho

    Checkpoints are not conducted. They are illegal under state law.

  • Illinois

    Several hundred checkpoints are conducted each year. Their legality is upheld under federal Constitution.

  • Indiana

    Checkpoints are conducted. Their legality is upheld under state Constitution.

  • Iowa

    Checkpoints are not conducted. They are not permitted; a statute authorizing roadblock controls does not authorize sobriety checkpoints.

  • Kansas

    Checkpoints are conducted once or twice a month. Their legality is upheld under state law and federal Constitution.

  • Kentucky

    Checkpoints are conducted weekly. Their legality is upheld under federal Constitution.

  • Louisiana

    Checkpoints are conducted. Their legality is upheld under state Constitution.

  • Maine

    Checkpoints are conducted. Their legality is upheld under federal Constitution.

  • Maryland

    Checkpoints are conducted weekly. Their legality is upheld under state and federal Constitution.

  • Massachusetts

    Checkpoints are conducted year-round. Their legality is upheld under state and federal Constitution.

  • Michigan

    Checkpoints are not conducted. They are illegal under state Constitution.

  • Minnesota

    Checkpoints are not conducted. They are illegal under state Constitution.

  • Mississippi

    Checkpoints are conducted weekly. Their legality is upheld under federal Constitution.

  • Missouri

    Checkpoints are authorized by law and their legality is upheld under state and federal Constitution. However, the state budget prohibits funds from being spent on them.

  • Montana

    Checkpoints are not conducted. Statute permits only safety spot-checks.

  • Nebraska

    6 to 10 checkpoints are conducted each month. Their legality is upheld under state law.

  • Nevada

    Checkpoints are conducted once or twice a month. Their legality is authorized by statute.

  • New Hampshire

    Checkpoints are conducted weekly (weather permitting). Their legality is authorized by statute, and must be judicially approved.

  • New Jersey

    Checkpoints are conducted once or twice a month. Their legality is upheld under state and federal Constitution. 

  • New Mexico

    Checkpoints are conducted. Their legality is upheld under state and federal Constitution, and law enforcement must follow guidelines.

  • New York

    Checkpoints are conducted. Their legality is upheld under federal Constitution.

  • North Carolina

    Checkpoints are conducted weekly. Their legality is authorized by statute.

  • North Dakota

    Checkpoints are conducted. Their legality is upheld under state and federal Constitution.

  • Northern Mariana Islands

    Checkpoints are conducted twice a month.

  • Ohio

    Checkpoints are conducted year-round. Their legality is upheld under state and federal Constitution.

  • Oklahoma

    Checkpoints are conducted once or twice a month. Their legality is upheld under state and federal Constitution.

  • Oregon

    Checkpoints are not conducted. They are illegal under state Constitution.

  • Pennsylvania

    Several hundred checkpoints are conducted yearly. Their legality is upheld under state and federal Constitution.

  • Rhode Island

    Checkpoints are not conducted. They are illegal under State Supreme Court decision.

  • South Carolina

    Checkpoints are conducted. There is no state authority upholding their legality.

  • South Dakota

    Checkpoints are held weekly. Their legality is upheld under state and federal Constitution.

  • Tennessee

    Checkpoints are conducted once or twice a month. Their legality is upheld under state and federal Constitution.

  • Texas

    Checkpoints are not conducted. They are illegal under Texas' interpretation of federal Constitution.

  • Utah

    Checkpoints are conducted about every other month. Their legality is authorized by statute.

  • Vermont

    Checkpoints are conducted weekly. Their legality is upheld under state and gederal Constitution.

  • Virgin Islands

    Checkpoints are conducted monthly and during national mobilizations and local festivals and carnivals.

  • Virginia

    Checkpoints are conducted weekly. Their legality is upheld under state and federal Constitution.

  • Washington

    Checkpoints are not conducted. They are illegal without authorizing statute per State Supreme Court (Seattle v. Mesiani; 1988).

  • West Virginia

    Checkpoints are conducted weekly. Their legality is upheld under state and federal Constitution.

  • Wisconsin

    Checkpoints are not conducted. They are prohibited by statute.

  • Wyoming

    Checkpoints are not conducted. They are prohibited by interpretation of roadblock statute.