1980 through 2004
48 continental states, alphabetical
speed limit == 55
speed limit == 65
speed limit == 70
speed limit == 75
no speed limit
=0 if none, =1 if primary, =2 if secondary
minimum drinking age
zero tolerance law
graduated drivers license law
blood alcohol limit .10
blood alcohol limit .08
administrative license revocation (per se law)
total traffic fatalities
total nighttime fatalities
total weekend fatalities
total fatalities per 100 million miles
nighttime fatalities per 100 million miles
weekend fatalities per 100 million miles
state population
total fatalities per 100,000 population
nighttime fatalities per 100,000 population
weekend accidents per 100,000 population
vehicle miles traveled, billions
unemployment rate, percent
percent population aged 14 through 24
sl70 + sl75 + slnone
=1 if primary seatbelt law
=1 if secondary seatbelt law
=1 if year == 1980
=1 if year == 2004