Main cause of cycle accidents?
Stellar HDF Member
Joined: Aug 2009
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Statistically, if you wear a helmet, stay sober, and ride a non-sportbike the odds are extremely low you'll die. (Sport bikes are 4x more likely to die than all others).
That being said, the biggest thing is rider inexperience like you said. They don't know how to ride well and can't stop/swerve from a dangerous cager, fail to negotiate a turn and run off road, or speed badly and end up in a wobble or highside.....
Teaching him to ride responsibly is the best thing you can do. Save the showing off for the track days with proper gear and controlled course. He'll thank you, and can brag to his friends he does 160 easy on the track while they pay out the butt for insurance due to tickets!
That being said, the biggest thing is rider inexperience like you said. They don't know how to ride well and can't stop/swerve from a dangerous cager, fail to negotiate a turn and run off road, or speed badly and end up in a wobble or highside.....
Teaching him to ride responsibly is the best thing you can do. Save the showing off for the track days with proper gear and controlled course. He'll thank you, and can brag to his friends he does 160 easy on the track while they pay out the butt for insurance due to tickets!
Grand HDF Member
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From: USA
Directly from the HURT Study - cause factors/countermeasures . Yes, its decades old, there is a new government study underway in Oklahoma by both OkStU and OU. I suspect that much of what was found in 1981 is true today.
Note that item number 1 is by far the largest incidents reported at nearly 75%!!! Numbers 6 - 9 are almost always referring to cars turning left across the path of a motorcycle. Notice the final words of item #9.
1. Approximately three-fourths of these motorcycle accidents involved collision with another vehicle, which was most usually a passenger automobile.
6. In the multiple vehicle accidents, the driver of the other vehicle violated the motorcycle right-of-way and caused the accident in two-thirds of those accidents
7. The failure of motorists to detect and recognize motorcycles in traffic is the predominating cause of motorcycle accidents. The driver of the other vehicle involved in collision with the motorcycle did not see the motorcycle before the collision, or did not see the motorcycle until too late to avoid the collision.
8. Deliberate hostile action by a motorist against a motorcycle rider is a rare accident cause. The most frequent accident configuration is the motorcycle proceeding straight then the automobile makes a left turn in front of the oncoming motorcycle.
9. Intersections are the most likely place for the motorcycle accident, with the other vehicle violating the motorcycle right-of-way, and often violating traffic controls.
Note that item number 1 is by far the largest incidents reported at nearly 75%!!! Numbers 6 - 9 are almost always referring to cars turning left across the path of a motorcycle. Notice the final words of item #9.
1. Approximately three-fourths of these motorcycle accidents involved collision with another vehicle, which was most usually a passenger automobile.
6. In the multiple vehicle accidents, the driver of the other vehicle violated the motorcycle right-of-way and caused the accident in two-thirds of those accidents
7. The failure of motorists to detect and recognize motorcycles in traffic is the predominating cause of motorcycle accidents. The driver of the other vehicle involved in collision with the motorcycle did not see the motorcycle before the collision, or did not see the motorcycle until too late to avoid the collision.
8. Deliberate hostile action by a motorist against a motorcycle rider is a rare accident cause. The most frequent accident configuration is the motorcycle proceeding straight then the automobile makes a left turn in front of the oncoming motorcycle.
9. Intersections are the most likely place for the motorcycle accident, with the other vehicle violating the motorcycle right-of-way, and often violating traffic controls.
Grand HDF Member
Joined: Aug 2009
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From: USA
I'll disagree. Although 30 years old the Hurt report clearly shows ~75% of all accidents are multi-vehicle. 1/4 is rider only.
*edit* 92% of the accidents reported in the study were self trained! This study may be why motorcycle safety courses sprung up in the past two decades. BUT, even with advanced training and a lot of experience the number one cause factor of failure to yield right of way is very very difficult to avoid.
Last edited by Mi3ninos; Jul 20, 2011 at 09:24 AM.
Elite HDF Member
Joined: May 2009
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From: Streetsboro, Oh
Hey since he did not get an HD at least he got a good brand and bike. I love Kaw's and have had a few them,one being a 2007 ZX6R I got new. Really anything can make a bike wreck, They are unstable vehicles LOL! just tell your sone to take it slow, learn well and ride under his limits and the limits of the bike.
Ultimate HDF Member
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From: Potsdam, NY
Summary of findings from the HURT report, note this study was done in 1981 by the University of California, there are no more recent studies of this particular subject that I am aware of: http://www.webbikeworld.com/Motorcyc...dy-summary.htm
- Approximately three-fourths of these motorcycle accidents involved collision with another vehicle, which was most usually a passenger automobile.
- Approximately one-fourth of these motorcycle accidents were single vehicle accidents involving the motorcycle colliding with the roadway or some fixed object in the environment.
- Vehicle failure accounted for less than 3% of these motorcycle accidents, and most of those were single vehicle accidents where control was lost due to a puncture flat.
- In the single vehicle accidents, motorcycle rider error was present as the accident precipitating factor in about two-thirds of the cases, with the typical error being a slide-out and fall due to over-braking or running wide on a curve due to excess speed or under-cornering.
- Roadway defects (pavement ridges, potholes, etc.) were the accident cause in 2% of the accidents; animal involvement was 1% of the accidents.
- In the multiple vehicle accidents, the driver of the other vehicle violated the motorcycle right-of-way and caused the accident in two-thirds of those accidents.
- The failure of motorists to detect and recognize motorcycles in traffic is the predominating cause of motorcycle accidents. The driver of the other vehicle involved in collision with the motorcycle did not see the motorcycle before the collision, or did not see the motorcycle until too late to avoid the collision.
- Deliberate hostile action by a motorist against a motorcycle rider is a rare accident cause. The most frequent accident configuration is the motorcycle proceeding straight then the automobile makes a left turn in front of the oncoming motorcycle.
- Intersections are the most likely place for the motorcycle accident, with the other vehicle violating the motorcycle right-of-way, and often violating traffic controls.
- Weather is not a factor in 98% of motorcycle accidents.
- Most motorcycle accidents involve a short trip associated with shopping, errands, friends, entertainment or recreation, and the accident is likely to happen in a very short time close to the trip origin.
- The view of the motorcycle or the other vehicle involved in the accident is limited by glare or obstructed by other vehicles in almost half of the multiple vehicle accidents.
- Conspicuity of the motorcycle is a critical factor in the multiple vehicle accidents, and accident involvement is significantly reduced by the use of motorcycle headlamps (on in daylight) and the wearing of high visibility yellow, orange or bright red jackets.
- Fuel system leaks and spills were present in 62% of the motorcycle accidents in the post-crash phase. This represents an undue hazard for fire.
- The median pre-crash speed was 29.8 mph, and the median crash speed was 21.5 mph, and the one-in-a-thousand crash speed is approximately 86 mph.
- The typical motorcycle pre-crash lines-of-sight to the traffic hazard portray no contribution of the limits of peripheral vision; more than three-fourths of all accident hazards are within 45deg of either side of straight ahead.
- Conspicuity of the motorcycle is most critical for the frontal surfaces of the motorcycle and rider.
- Vehicle defects related to accident causation are rare and likely to be due to deficient or defective maintenance.
- Motorcycle riders between the ages of 16 and 24 are significantly overrepresented in accidents; motorcycle riders between the ages of 30 and 50 are significantly underrepresented. Although the majority of the accident-involved motorcycle riders are male (96%), the female motorcycles riders are significantly overrepresented in the accident data.
- Craftsmen, laborers, and students comprise most of the accident-involved motorcycle riders. Professionals, sales workers, and craftsmen are underrepresented and laborers, students and unemployed are overrepresented in the accidents.
- Motorcycle riders with previous recent traffic citations and accidents are overrepresented in the accident data.
- The motorcycle riders involved in accidents are essentially without training; 92% were self-taught or learned from family or friends. Motorcycle rider training experience reduces accident involvement and is related to reduced injuries in the event of accidents.
- More than half of the accident-involved motorcycle riders had less than 5 months experience on the accident motorcycle, although the total street riding experience was almost 3 years. Motorcycle riders with dirt bike experience are significantly underrepresented in the accident data.
- Lack of attention to the driving task is a common factor for the motorcyclist in an accident.
- Almost half of the fatal accidents show alcohol involvement.
- Motorcycle riders in these accidents showed significant collision avoidance problems. Most riders would over-brake and skid the rear wheel, and under-brake the front wheel greatly reducing collision avoidance deceleration. The ability to countersteer and swerve was essentially absent.
- The typical motorcycle accident allows the motorcyclist just less than 2 seconds to complete all collision avoidance action.
- Passenger-carrying motorcycles are not overrepresented in the accident area.
- The driver of the other vehicles involved in collision with the motorcycle are not distinguished from other accident populations except that the ages of 20 to 29, and beyond 65 are overrepresented. Also, these drivers are generally unfamiliar with motorcycles.
- The large displacement motorcycles are underrepresented in accidents but they are associated with higher injury severity when involved in accidents.
- Any effect of motorcycle color on accident involvement is not determinable from these data, but is expected to be insignificant because the frontal surfaces are most often presented to the other vehicle involved in the collision.
- Motorcycles equipped with fairings and windshields are underrepresented in accidents, most likely because of the contribution to conspicuity and the association with more experienced and trained riders.
- Motorcycle riders in these accidents were significantly without motorcycle license, without any license, or with license revoked.
- Motorcycle modifications such as those associated with the semi-chopper or cafe racer are definitely overrepresented in accidents.
- The likelihood of injury is extremely high in these motorcycle accidents-98% of the multiple vehicle collisions and 96% of the single vehicle accidents resulted in some kind of injury to the motorcycle rider; 45% resulted in more than a minor injury.
- Half of the injuries to the somatic regions were to the ankle-foot, lower leg, knee, and thigh-upper leg.
- Crash bars are not an effective injury countermeasure; the reduction of injury to the ankle-foot is balanced by increase of injury to the thigh-upper leg, knee, and lower leg.
- The use of heavy boots, jacket, gloves, etc., is effective in preventing or reducing abrasions and lacerations, which are frequent but rarely severe injuries.
- Groin injuries were sustained by the motorcyclist in at least 13% of the accidents, which typified by multiple vehicle collision in frontal impact at higher than average speed.
- Injury severity increases with speed, alcohol involvement and motorcycle size.
- Seventy-three percent of the accident-involved motorcycle riders used no eye protection, and it is likely that the wind on the unprotected eyes contributed in impairment of vision which delayed hazard detection.
- Approximately 50% of the motorcycle riders in traffic were using safety helmets but only 40% of the accident-involved motorcycle riders were wearing helmets at the time of the accident.
- Voluntary safety helmet use by those accident-involved motorcycle riders was lowest for untrained, uneducated, young motorcycle riders on hot days and short trips.
- The most deadly injuries to the accident victims were injuries to the chest and head.
- The use of the safety helmet is the single critical factor in the prevention of reduction of head injury; the safety helmet which complies with FMVSS 218 is a significantly effective injury countermeasure.
- Safety helmet use caused no attenuation of critical traffic sounds, no limitation of precrash visual field, and no fatigue or loss of attention; no element of accident causation was related to helmet use.
- FMVSS 218 provides a high level of protection in traffic accidents, and needs modification only to increase coverage at the back of the head and demonstrate impact protection of the front of full facial coverage helmets, and insure all adult sizes for traffic use are covered by the standard.
- Helmeted riders and passengers showed significantly lower head and neck injury for all types of injury, at all levels of injury severity.
- The increased coverage of the full facial coverage helmet increases protection, and significantly reduces face injuries.
- There is not liability for neck injury by wearing a safety helmet; helmeted riders had less neck injuries than unhelmeted riders. Only four minor injuries were attributable to helmet use, and in each case the helmet prevented possible critical or fatal head injury.
- Sixty percent of the motorcyclists were not wearing safety helmets at the time of the accident. Of this group, 26% said they did not wear helmets because they were uncomfortable and inconvenient, and 53% simply had no expectation of accident involvement.
- Valid motorcycle exposure data can be obtained only from collection at the traffic site. Motor vehicle or driver license data presents information which is completely unrelated to actual use.
- Less than 10% of the motorcycle riders involved in these accidents had insurance of any kind to provide medical care or replace property.
Last edited by fat_tony; Jul 20, 2011 at 08:43 PM.
Elite HDF Member
Joined: Aug 2008
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From: Kentucky
That often requires a failure to notice on both sides (unless the car makes a quick, sudden movement) so you might want to get his mind on wathing cars that are about to turn or pull out, wathing for the tire to start to turn (easier to see than watching those whole car), having a "escape plan" when he sees one, etc.
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Outstanding HDF Member
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From: IA
My son just bought his first bike, a Zx-6r Kaw ( I know, but he is young and doesnt know any better yet!) and asked me what I thought the main cause of most bike accidents was. (He will be taking the msf course, starts today)
After thinking a bit, I had a couple I could come up with but would like to know what you think.
Inexperienced rider
Riding over rider or equipments limits
Showing off (Street bikes especially)
Add to the list
After thinking a bit, I had a couple I could come up with but would like to know what you think.
Inexperienced rider
Riding over rider or equipments limits
Showing off (Street bikes especially)
Add to the list
The majority of Motorcycle crashes are single vehicle crashes (rider error) in curves. Improper entry speed and over-braking in the curve or riding off the road.
In multi vehicle crashes it is motorcycles coming in conflict with turning drivers. Usually due to excessive speed, improper lane position, or inattentiveness (failure to use S.E.E.)
The majority of motorcycle fatalities involve alcohol or riders being impaired.
There are no accidents. The vast majority of motorcycle crashes could have been avoided if the rider had been riding safe and trained.