TRAFFIC2.DES

year      totacc    fatacc    injacc    pdoacc    ntotacc   nfatacc   ninjacc  
npdoacc   rtotacc   rfatacc   rinjacc   rpdoacc   ushigh    cntyrds   strtes   
t         tsq       unem      spdlaw    beltlaw   wkends    feb       mar      
apr       may       jun       jul       aug       sep       oct       nov      
dec       ltotacc   lfatacc   prcfat    prcrfat   lrtotacc  lrfatacc  
lntotacc  lnfatacc  prcnfat   lushigh   lcntyrds  lstrtes   spdt      beltt     
prcfat_1 

  Obs:   108

  1. year                     1981 to 1989
  2. totacc                   statewide total accidents
  3. fatacc                   statewide fatal accidents
  4. injacc                   statewide injury accidents
  5. pdoacc                   property damage only accidents
  6. ntotacc                  noninterstate total acc.
  7. nfatacc                  noninterstate fatal acc.
  8. ninjacc                  noninterstate injur acc.
  9. npdoacc                  noninterstate property acc.
 10. rtotacc                  total acc. on rural 65 mph roads
 11. rfatacc                  fatal acc. on rural 65 mph roads
 12. rinjacc                  injury acc. on rural 65 mph roads
 13. rpdoacc                  property acc. on rural 65 mph roads
 14. ushigh                   acc. on U.S. highways
 15. cntyrds                  acc. on county roads
 16. strtes                   acc. on state routes
 17. t                        time trend
 18. tsq                      t^2
 19. unem                     state unemployment rate
 20. spdlaw                   =1 after 65 mph in effect
 21. beltlaw                  =1 after seatbelt law
 22. wkends                   # weekends in month
 23. feb                      =1 if month is Feb.
 24. mar                      
 25. apr                      
 26. may                      
 27. jun                      
 28. jul                      
 29. aug                      
 30. sep                      
 31. oct                      
 32. nov                      
 33. dec                      
 34. ltotacc                  log(totacc)
 35. lfatacc                  log(fatacc)
 36. prcfat                   100*(fatacc/totacc)
 37. prcrfat                  100*(rfatacc/rtotacc)
 38. lrtotacc                 log(rtotacc)
 39. lrfatacc                 log(rfatacc)
 40. lntotacc                 log(ntotacc)
 41. lnfatacc                 log(nfatacc)
 42. prcnfat                  100*(nfatacc/ntotacc)
 43. lushigh                  log(ushigh)
 44. lcntyrds                 log(cntyrds)
 45. lstrtes                  log(strtes)
 46. spdt                     spdlaw*t
 47. beltt                    beltlaw*t
 48. prcfat_1                 prcfat[t-1]

