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KEY: mph = miles per hour; R = revised.
a The "No Statutory Limit/Non-Trafficway or Driveway Access" designation is included in this category.
b The "Not Reported" designation is included in this category.
KEY: R = revised.
KEY: BAC = blood alcohol concentration; DUI = driving under the influence; DWI = driving while intoxicated.
a Per se law makes it illegal in and of itself to drive with an alcohol concentration measured at or above a certain level.
b Includes the District of Columbia in 2000 and 2001.
c Includes the District of Columbia and Puerto Rico beginning in 2003.
d Includes the District of Columbia beginning in 1996. Includes the District of Columbia and Puerto Rico beginning in 2010.
e States that impose additional thresholds for ALR beyond those...
a Does not include aviation jet fuel.
b In 2015 Marine became Boating with unstated formula changes from the source.
c Includes state, county, and municipal use, industrial and commercial use, construction use, and miscellaneous.
KEY: Btu = British thermal unit; N = data do not exist; R = revised; U = data are not available.
a Domestic operations only.
b Includes fuel used in air taxi operations, but not commuter operations. Data for 1996 are estimated using new information on no respondents and are therefore not comparable to earlier years. See the accuracy statement in the appendix for more detailed information.
c Data from 2007 were calculated using a new methodology developed by FHWA. Data for these years are based on new categories...
KEY: kWh = kilowatt-hour; N = data do not exist; R = revised, U = data are not available.
a Domestic operations only.
b Includes fuel used in air taxi operations, but not commuter operations. Data for 1996 are estimated using new information on no respondents and are therefore not comparable to earlier years. See the accuracy statement in the appendix for more detailed information.
c Data from 2007 were calculated using a new methodology developed by FHWA. Data for these years are based on new categories and are not...
KEY: R = revised; U = data are unavailable.
KEY: N = data do not exist; R = revised; U = data are not available.
a Data from 2007 were calculated using a new methodology developed by FHWA. Data for these years are based on new categories and are not comparable to previous years. The new category Light duty vehicle, short wheel base replaces the old category Passenger car and includes passenger cars, light trucks, vans and sport utility vehicles with a wheelbase (WB) equal to or less than 121 inches. The new category Light duty vehicle, long wheel base replaces Other 2-axle, 4-...
KEY: BAC = blood alcohol concentration; R=revised.