1 / 51

Countermeasures That Work

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

salaam
Download Presentation

Countermeasures That Work

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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! • Fatalities are generally the result of rollovers or striking fixed objects after running off the road.

  3. So HowDo 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 • 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.

  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?? • 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.

  7. 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)

  8. “End Road Work”???

  9. Broadening the perspective

  10. Clear Zone Guard rail signs Pavement marking

  11. Delineation of objects in the clear zone

  12. The “Killer” mailbox

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

  14. The Pavement Edge Dropoff

  15. It doesn’t have to be this way!

  16. Correcting Surface Defects

  17. Good corrective measure by SDDOT maintenance personnel

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

  19. 1:8 to 1 inslope and virtually no shoulder. Approx. 2,500 ADT.

  20. A brief look at unpaved roads with geometric defects

  21. Crown?

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

  23. Imagine a pot trailer on this road.

  24. High Shoulder – Obstruction of Drainage

  25. There are too many of these situations

  26. A very good example.

  27. What’s wrong with this picture??

  28. The right way!

  29. Substandard Surface Aggregate

More Related