| Ttlge60 |
Total crashes involving drivers > 60 years of age |
| Fatge60 |
Fatal crashes involving drivers > 60 years of age |
| Injrge60 |
Injury crashes involving drivers > 60 years of age |
| Pdoge60 |
Property damage only crashes involving drivers > 60
years of age |
| Ttllt60 |
Total crashes involving drivers < 60 years of age |
| Fatlt60 |
Fatal crashes involving drivers < 60 years of age |
| Injrlt60 |
Injury crashes involving drivers < 60 years of age |
| Pdolt60 |
Property damage only crashes involving drivers < 60
years of age |
| Rpcinc |
County real per capita income: 1982-84 US $ |
| Cpigas |
Regional consumer price index for gasoline: 1982-84 = 100 |
| Cpialc |
Regional consumer price index for alcohol: 1982-84 = 100 |
| Uerate |
County unemployment rate |
| Vmtge60 |
County vehicle-miles traveled (vmt): drivers > 60 years old |
| Vmtlt60 |
County vmt: drivers < 60 years old |
| Totvmt |
Total county vmt |
| Popden |
Persons per square mile in the county |
| Pctge60 |
Share of the county population > 60 years old |
| Alclic |
Number of retail alcohol licenses in the county |
| AB541 |
Dummy variable for an omnibus DUI prevention law (effective Jan. 1, 1982), which equals 0 for 1981 and 1 for 1982-98 |
| APS |
Dummy variable for an administrative per se license suspension law (effective July 1, 1990), which equals 0 for 1981-89 and 1 for 1990-98 |
| Slmt_65 |
Dummy variable for 65 mph speed limits on rural Interstate highways (effective May 1987), which equals 0 for 1981-86 and 1 for 1987-98 |
| Slmt_70 |
Dummy variable for 70 mph speed limits on portions of the state's Interstate highways (enacted in January 1997), which equals 0 for 1981-96 and 1 for 1997-98 |
| Pc_dui |
Per capita DUI arrests in the county |
| Pcmcyc |
Per capita motorcycle registrations in the county |
