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Roadway Departure Safety Basics

Learn the basics of roadway departure safety, including statistics on fatalities, strategies to reduce fatalities, and common causes of crashes. Discover how road conditions, collision avoidance, vehicle component failure, and driver error contribute to roadway departures.

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Roadway Departure Safety Basics

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  1. Roadway Departure Safety Basics Roadway Departure Safety Basics Ken Kochevar Safety Program Manager

  2. Fatalities in the USA • (2013 - 2015 Average) Fatalities in the USA(2013 - 2015 Average) 115 (NH) 489 57 (VT) 144 215 National Average – 33,576 Fatalities 138 386 372 337 (MA) 205 538 1,121 135 127 54 (RI) 937 267 (CT) 1,202 320 553 (NJ) 227 1,035 294 116 (DE) 783 251 971 3,128 505 291 732 363 797 473 (MD) 690 1,318 972 22 (DC) 838 663 500 332 856 632 841 1,258 2,612 3,480 723 63 > 1500 average fatalities 97 751-1500 average fatalities 150-750 average fatalities Data Source: NHTSA FARS < 150 average fatalities

  3. AASHTO Strategic Plan Strategic Objective Promote highway-related strategies to assist in cutting fatalities by half by 2030 with a vision towards zero fatalities.

  4. Roadway Departure Fatalities Percent • (2013 - 2015 Average) Roadway Departure Fatalities Percent(2013 - 2015 Average) National Average RwD % = 54% 74 (NH) 60 82 (VT) 75 73 65 52 57 (MA) 62 68 47 62 67 52 (RI) 73 49 57 (CT) 62 44 (NJ) 60 63 60 42 (DE) 43 55 49 53 46 58 73 48 (MD) 65 64 60 66 27 (DC) 59 62 58 42 47 66 59 54 64 60 60 53 38 > 70% average 59 61% - 70% average 54% - 60% average 48 < 54% average

  5. Roadside car crash.

  6. FHWA Roadway departure strategic plan. 30% 23%

  7. Overturn Crashes Source: FARS 2010-2013

  8. Opposite Direction Crashes NCHRP Report 500, Volume 6 Reported that only 4.2% of head-ons involved a passing vehicle. Source: FARS 2010-2013

  9. Fixed Object Fatal Crashes Trees are 48% of Fixed Object Fatalities Source: FARS 2010-2013

  10. Tree Crashes Trees 19% Trees Source: FARS 2010-2013 Trees are 48% of Fixed Object Fatalities

  11. So, why do drivers leave the road? • Roadway Condition • Collision Avoidance • Vehicle Component Failure • Driver Error

  12. Crashes Caused by Various Factors: Systems Approach 3% 27% 57% Driver 93% Roadway 34% 3% 1% 6% Human is weakest link in this system, so we must design around human needs. Vehicle 12% 2% FROM: Lum & Reagan, Public Roads Magazine, Winter 1995, “Interactive Highway Safety Design Module”

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