SLIDE 1
Two subpopulations:
Alcohol-involved vs. non-alcohol crashes
- Non-alcohol crashes in Thailand were very
different from non-alcohol crashes in Los Angeles.
- But alcohol-involved crashes were very
Rider Blood Alcohol in Thailand Motorcycle Crashes James V. Ouellet - - PowerPoint PPT Presentation
Rider Blood Alcohol in Thailand Motorcycle Crashes James V. Ouellet - - PowerPoint PPT Presentation
Rider Blood Alcohol in Thailand Motorcycle Crashes James V. Ouellet Head Protection Research Laboratory Paramount, CA 90723 USA Vira Kasantikul, M.D. Silpakorn University Nakhon-Pathom, 73000 Thailand Two subpopulations: Alcohol-involved
SLIDE 2
SLIDE 3
Accident time for drinkers and non-drinkers in Thailand, 3-hour rolling average
2 4 6 8 10 12 14 16 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 0 1 2 3 4 5
Accident hour (24 hour clock) Percent
No alcohol or drugs Alcohol or drugs used
SLIDE 4
Accident time for drinkers and non-drinkers in Hurt study, 3-hour rolling average
2 4 6 8 10 12 14
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 22 23 0 1 2 3 4 5
Accident hour (24 hour clock) Percent
Non-drinkers (n=773) Drinkers (n=103)
SLIDE 5
Most common accident configurations among non-drinkers
Rank
Los Angeles (n = 773) Thailand (n = 683)
Configuration Percent Configuration Percent
1 23.0 11.1 2 14.0 9.2 3 9.2 8.3 4 8.7 8.3 5 8.2 7.5
OV Motorcycle
SLIDE 6
Most common accident configurations among drinking riders
Rank
Los Angeles (n = 102) Thailand (n = 393)
Configuration Percent Configuration Percent
1 38.8 21.4 2 13.6 15.0 3 10.7 7.9 4 4.9 6.4 5 3.9 5.1 (tie)
SLIDE 7
Loss of control mode, drinkers vs. non- drinkers in Thailand & Hurt study
Loss of control mode No alcohol Alcohol involved
Los Angeles ( n=773 ) Thailand ( n=683 ) Los Angeles ( n=103 ) Thailand ( n=393 )
Capsize
4.7 % 3.4 % 4.9 % 4.8 %
Slide-out
22.8 % 6.0 % 20.4 % 8.4 %
High-side
1.9 % 0.6 % 3.9 % 1.0 %
Ran off road
6.3 % 2.2 % 23.3 % 15.8 %
Other
1.8 % 0.7 % 4.9 % 1.8 %
No Loss
62.5 % 87.0 % 42.7 % 68.2 %
SLIDE 8
Major traffic violations
Major traffic violations No alcohol Alcohol involved
Los Angeles Thailand Los Angeles Thailand
Running red light Riding in opposing lane
12 % 3.6 % 25 % 6.7 % 22 % 9.3 % 51 % 12 %
SLIDE 9
Rider or OV driver error in multiple vehicle crashes
39.7 49.4 72.2 75.6 60.3 50.6 27.8 24.4 10 20 30 40 50 60 70 80 90 100 Los Angeles - Non-drinkers Thailand - Non-drinkers Los Angeles - Drinking riders Thailand - Drinking riders
Percent
Rider error OV driver error
SLIDE 10
Cumulative percent distribution of rider Blood Alcohol Content (BAC)
10 20 30 40 50 60 70 80 90 100 40 80 120 160 200 240 280 320 >350
Rider BAC, mg/dL Cumulative percent
All riders (n=372) All riders with BAC>0 (n=229)
SLIDE 11
Rider inattention as a function of rider BAC
10 20 30 40 50 60 70 80 90 100 1 - 49 50-79 80-99 100-149 150-199 200-249 250+
Rider BAC, mg/dl Percent
SLIDE 12
Single vehicle, ran-off-road and loss-of-control crashes, by BAC level
10 20 30 40 50 60 1 - 49 50-79 80-99 100-149 150-199 200-249 250+
BAC level, mg/dl Percent
Single vehicle Lost control Ran off road
SLIDE 13
Object struck by motorcycle as a function of rider BAC
10 20 30 40 50 60 70 80 90 1-49 50-79 80-99 100-149 150-199 200-249 250+
Rider BAC, mg/dl Percent of group
Other vehicle in traffic Parked vehicle Roadway, roadside object Animal, pedestrian, other
SLIDE 14
Rider error as primary or sole cause factor by BAC, all crashes
20 40 60 80 100 120 140 1 - 49 50-79 80-99 100-149 150-199 200-249 250+
Rider BAC, mg/dl Percent
Primary cause (n=372) Sole cause (n=135)
SLIDE 15
Primary cause factor by BAC in multiple vehicle crashes
20 40 60 80 100 120 140 1 - 49 50-79 80-99 100-149 150-199 200-249 250+
Rider BAC, mg/dl Percent
Rider error (n=292) OV driver error (n=259)
SLIDE 16
Minimum BAC level that differs significantly from non-drinkers
20 40 60 80 100 120 Attention Loss of control Rider error PCF Hit roadside object OV error PCF Single vehicle Ran off road Rider sole cause Ran red light
BAC, mg/dl
Lower Median Upper
SLIDE 17
Motorcycle precrash speed by rider BAC, 25th, 50th & 75th percentile
10 20 30 40 50 60 70 1-49 50-79 80-99 100-149 150-199 200-249 250+ Rider BAC, mg/dl Precrash speed, km/hr
25th %ile speed Median speed 75th %ile speed
SLIDE 18
Motorcycle crash speed by BAC group, 25th, 50th and 75th percentiles
10 20 30 40 50 60 001-049 50-79 80-99 100-149 150-199 200-249 250+ Rider BAC group Speed, km/hr
25 %ile 50 %ile 75 %ile
SLIDE 19
Medical treatment by BAC level
10 20 30 40 50 60 70 1-49 50-79 80-99 100-149 150-199 200-249 250+ Rider BAC group Percent
Minor treatment Hospitalized Fatal
SLIDE 20