1. Countermeasures That Work Transportation Safety Conference Pierre, SD February 22, 2007

2. Data Driven Safety 67% of crashes in SD are the result of roadway departures! 67% of crashes in SD are the result of roadway departures! Fatalities are generally the result of rollovers or striking fixed objects after running off the road. Fatalities are generally the result of rollovers or striking fixed objects after running off the road.

3. So How Do We Keep More of These Vehicles on the Road??

4. First Offensive Tool: Signs, Delineation & Pavement Marking Good case study for this: Mendocino County, CA Good case study for this: Mendocino County, CA They demonstrated just how effective signs are as a low-cost safety measure. They demonstrated just how effective signs are as a low-cost safety measure. Mendocino reduced its crashes by a startling 42.1 percent from 1992 to 1998 at a cost of $79,260 over the 6-year period. Mendocino reduced its crashes by a startling 42.1 percent from 1992 to 1998 at a cost of $79,260 over the 6-year period.

5. "We believe that the most cost- effective method for enhancing safety on rural roads is to make the driver more aware of road conditions through consistent signing and markings“. Eugene C. Calvert, P.E., former director of transportation with MCDOT

6. Does the Mendocino Co study have relevant information for us?? Does the Mendocino Co study have relevant information for us?? MCDOT is responsible for maintaining and improving 1,018 miles of secondary roads - both paved and unpaved local roads. MCDOT is responsible for maintaining and improving 1,018 miles of secondary roads - both paved and unpaved local roads. ADT ranges from approx. 18,000 cars per day to as few as 20 cars per day. ADT ranges from approx. 18,000 cars per day to as few as 20 cars per day.

7. Mendocino County focused on improving signage because installing signs is cheaper than improving the road geometry by widening or flattening curves. Mendocino County focused on improving signage because installing signs is cheaper than improving the road geometry by widening or flattening curves. Installation of each sign costs Mendocino County about $107 for labor and materials. Quite a few signs can be installed for an amount that would pay for very little in construction realignment. (1998 Data) Installation of each sign costs Mendocino County about $107 for labor and materials. Quite a few signs can be installed for an amount that would pay for very little in construction realignment. (1998 Data)

14. “End Road Work”???

15. Broadening the perspective

16. Pavement marking signs Clear Zone Guard rail

17. Delineation of objects in the clear zone

19. The “Killer” mailbox

22. A hazard for a run-off-the-road incident

23. The Pavement Edge Dropoff

25. It doesn’t have to be this way!

31. Correcting Surface Defects

32. Good corrective measure by SDDOT maintenance personnel

35. The real tough situations: Requires long-term planning, acquiring project level funding and prioritization

37. 1:8 to 1 inslope and virtually no shoulder. Approx. 2,500 ADT.

39. A brief look at unpaved roads with geometric defects

40. Crown?

41. Some have too little crown, this one has too much.

42. Imagine a pot trailer on this road.

43. High Shoulder – Obstruction of Drainage

45. There are too many of these situations

47. A very good example.

48. What’s wrong with this picture??

49. The right way!

50. Substandard Surface Aggregate