This table details the legal blood alcohol concentration (BAC) and breath alcohol concentration (BrAC) limits for the general population of drivers in various jurisdictions. It is specified where different limits apply to sub-populations of drivers.
Values in the table are given in milligrams per milliliter (mg/mL) of blood for BAC limits and in milligrams per liter (mg/L) of exhaled air for BrAC limits.
The UN Road Safety Collaboration Monitoring and Evaluation Working Group considers legislation that stipulates a BAC of 0.50 mg/mL for the general population and a lower limit for young/novice and commercial drivers to be an outcome indicator for the Decade of Action on Road Safety 2011-2020.
This table is updated on an ongoing basis as jurisdictions enact or revise their requirements. It was last updated overall in February 2016 with assistance from staff of the Law Library of Congress (Washington, DC).
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