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Rural, Non-Freeway Rumbles Keeping Drivers on the Road…

Rural, Non-Freeway Rumbles Keeping Drivers on the Road…. 80% of all fatal single vehicle run-off-road (ROR) crashes occur on two lane rural roads. 75% of all head-on crashes occur on rural roads. Why Rural , Non-Freeway ?. Which of these rural crashes are correctable by rumble strips…?.

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Rural, Non-Freeway Rumbles Keeping Drivers on the Road…

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  1. Rural, Non-Freeway Rumbles Keeping Drivers on the Road…

  2. 80% of all fatal single vehicle run-off-road (ROR) crashes occur on two lane rural roads 75% of all head-on crashes occur on rural roads Why Rural , Non-Freeway ?

  3. Which of these rural crashes are correctable by rumble strips…?

  4. Correctable? • swerve to avoid anything…NO • hydroplane…NO • tire blowout…NO • trailer sway…NO • snow or ice…NO

  5. Correctable = Drift-Off

  6. Michigan DOTDrift-Off Crash Maps- Dave Morena, FHWA Safety and Traffic Engineer: • Computer generated • Tested to 80% reliability

  7. Region Maps Centerline Drift-over Crashes • 5-YR Trunkline Rural, 55 mph: • 2322 crashes • 255 serious crashes • 129 deaths

  8. Region Maps Centerline Drift-over Crashes

  9. Region Maps Centerline Drift-over Crashes

  10. Region Maps:Shoulder Drift-off Crashes • 5-YR Trunkline Rural, 55 mph: • 3410 crashes • 290 serious crashes • 45 deaths

  11. Common Concerns • Pavement / Joint Deterioration • Microsurface • Noise • Bicyclists • Motorcyclists

  12. Mitigation Strategies • 3/8” depth • 1’-2’ centerline pattern • 6” to 12” offset • 6’ wide min. paved shoulder • 48’-12’ shoulder pattern • field review

  13. Alaska Arizona Colorado Delaware Georgia Iowa Hawaii Kansas Kentucky Mississippi Missouri Minnesota Pennsylvania Tennessee Washington Aggressive Use of Rumbles

  14. ‘Crash type is not random… …crash location is.’ Brian Chandler, Missouri Department of Transportation

  15. Spot treatmentor System-wide? SYSTEM-WIDE

  16. Questions? • Thank you…..

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