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]