Roadside Safety Proven Countermeasures. Emmett McDevitt Transportation Safety Engineer Federal Highway Administration

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1 Roadside Safety Proven Countermeasures Emmett McDevitt Transportation Safety Engineer Federal Highway Administration

2 Safety Statistics On average each year 43,000 + people die in traffic related crashes. On average 3.2 Million are injured Family Co-Workers Friends

3 Major League Baseball Field Seating capacity 41,000 to 47,000 Population of Phoenix Arizona 3,251,876

4

5 National Safety Objectives Roadway Departure Intersections Pedestrians

6 National Safety Objectives Roadway departure Minimize roadway departures Reduce severity of roadway departures

7 Run-Off Off-the-Road Average of 14,000+ fatalities per year About 39% of total average fatalities

8 Intersections Average of fatalities per year; About 21% of total average fatalities

9 Pedestrians Average of fatalities per year About 11% of total average fatalities

10 Run-off off-road Crashes 42% occur on curves 50% in rural areas 42% are rollovers and life threatening events 25% are collisions with trees

11 Run-Off Off-the-Road Problem +1/3 of all Traffic Fatalities 2/3 on 2-lane 2 roads 1/2 at night

12 Run-off off-the-road Inattention Reasons Poor visibility Speeding Impaired Driving Avoidance of obstacle

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14

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16 Welcome to Boise

17

18 RUMBLE STRIPS Milled-in Centerline Rumble Strips

19 Quick History Rumble Strips NYSTA Retrofitted entire system in the years between Entire NYS system of Interstates, Expressways and Freeways were retro-fitted by late 1990 s Both enjoyed an average 65% reduction in ROTR accidents

20 Shoulder Rumble Strips Studies show reductions in ROR crashes with presence of shoulder rumble strips. 70 % Pennsylvania Turnpike, % New Jersey Turnpike, % New York State, % New York Thruway, % Massachusetts Turnpike, % Washington, % California Interstate, % Kansas Turnpike, 1991

21 Rumble Stripes Night + Rain Conditions

22

23 Experimental use of: Wet reflective PM s Grooved in PM Grooved in High profile beads (1.9 index) Grooved in Wet-reflective tape Grooved in True Wet reflective paint with elements

24 Grooved in True Wet Reflective Element

25 The Problem

26

27

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29 Dangerous Drop-Offs

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31 The Cause Erosion from tires Erosion from weather Successive overlays without sufficient backfill

32 The Result

33 The Solution Safety Edge

34 Wedge Joint

35

36 Better Guidance and Delineation

37 HORIZONTAL CURVES Widened/Stabilized Lane or Shoulder on Inside of Curve, Cheverons if appropriate

38 Priority Order of Treatment Remove obstacle Make potential hazard traversable Relocate obstacle Reduce impact severity Shield obstacle Delineate obstacle

39 Run-off off-the-road Solutions Remove obstacle BEFORE AFTER Digitally enhanced photograph

40 Eliminate Need for Guiderail

41

42

43 Fixed Objects

44 Priority Order of Treatment Remove obstacle Make potential hazard traversable Relocate obstacle Reduce impact severity Shield obstacle Delineate obstacle

45 Before After

46

47 What s wrong with this picture?

48 SLOPES, EMBANKMENTS AND DITCHES VERTICAL DROP-OFF UTILITY POLE IN DITCH NON-TRAVERSABLE FORESLOPE

49 Roadside Hazard Fatalities Tree 28% Other 10% Conc. Barrier 2% Br. Rail 2% Sign Post 6% Fence 4% Culvert 5% Curb 6% Embankment 10% Utility Pole 9% Guardrail 10% Ditch 8%

50 Priority Order of Treatment Remove obstacle Make potential hazard traversable Relocate obstacle Reduce impact severity Shield obstacle Delineate obstacle

51 Run-off off-the-road Relocate obstacle BEFORE AFTER

52

53 Priority Order of Treatment Remove obstacle Make potential hazard traversable Relocate obstacle Reduce impact severity Shield obstacle Delineate obstacle

54 Run-off off-the-road Reduce impact severity with Crashworthy Devices

55

56 Priority Order of Treatment Remove obstacle Make potential hazard traversable Relocate obstacle Reduce impact severity Shield obstacle Delineate obstacle

57 Shielding the object

58 Roadside Hazard Fatalities Tree 28% Other 10% Conc. Barrier 2% Br. Rail 2% Sign Post 6% Fence 4% Culvert 5% Curb 6% Embankment 10% Utility Pole 9% Guardrail 10% Ditch 8%

59 Priority Order of Treatment Remove obstacle Make potential hazard traversable Relocate obstacle Reduce impact severity Shield obstacle Delineate obstacle

60 Run-off off-the-road Delineate obstacle

61 Better Guidance and Delineation

62 Warn Run-Off Off-the-Road Remove Relocate Reduce Impact Shield Delineate

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