Dave Moulton

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Entries in Safety and Defensive Riding (53)

Monday
Jun162008

Dispelling the myth

I have just read a wonderful pro cycling article in the British Medical Journal. (BMJ) It came out last December so you may have already seen it. If not, there is a link at the end.

What makes this piece different is that it is not written by a cycling advocacy group, but is an article for doctors by an independent writer pointing out the health benefits of cycling, and how these benefits far outweigh the slight risk of riding on the road.

This is a view that I strongly agree with. If cycling is ever to become popular again in the western world, the myth that cycling is dangerous must be dispelled.

The BMJ article comes out against helmet use on the grounds that it gives the impression that cycling is more dangerous than it really is. I am inclined to agree to a certain degree. I wear a helmet, but it is my choice; I am opposed to helmet use being mandatory, especially if it stops people from cycling.

The article points out, when helmets were made compulsory in Australia, hospital admissions from head injury fell by 15-20%, but the level of cycling fell by 35%. Ten years later, cycling levels in Western Australia are still 5-20% below the level they were before the introduction of the law yet head injuries are only 11% lower than would be expected without helmets.

At the same time, 17 times more motorists than cyclists died of head injuries in Australia during 1988, and yet no one is advocating mandatory helmets for motor vehicle drivers.

The BMJ article refers to the inherent risks of road cycling as trivial. Of at least 3.5 million regular cyclists in Britain, only about 10 a year die in rider only accidents where there is no other vehicle involved. Compare this with about 350 people killed each year by head injuries after falling down steps or tripping. (Total cycling fatalities in the UK in 2005 were 148.)

Another study estimated that out of 150,000 people admitted to hospital annually with head injuries in the United Kingdom; road cyclists account for only 1% of this total, yet 6% of the population are regular cyclists and a further 5% are occasional cyclists; 60% of admissions were alcohol related. Maybe we need helmets for walking drunks.

Finally, the BMJ article touched on a point that is the crux of the whole road death issue. In 1983, compulsion to wear seatbelts cut deaths among drivers and front seat passengers by 25%. Up until 1983, there had been a long established trend of declining deaths in car accidents. This reversed and just six years later by 1989 death rates among car drivers were higher than they had been in 1983.

Evidently, the driving population "risk compensated" away the substantial benefits of seatbelts by taking extra risks, at the same time putting others in more danger. This period saw a jump in deaths of cyclists.

Although temporary, the jump was followed by a decline and can be explained by cyclists having adapted to a more dangerous road environment through extra caution, or simply giving up cycling.

It is no coincidence that the long decline in cycling in the UK began in 1983. Between 1974 and 1982 cycling mileage in Britain increased 70%, but there was no increase in fatalities until the seatbelt law was introduced in 1983.

The civilized world should be outraged at the appalling casualty rate on our roads. It is the drivers of automobiles who are doing all the killing. In particular, aggressive drivers are the problem, speeding, running red lights, and taking all kinds of other risks.

In many cases, an aggressive driver is an angry driver, and I have heard it said that an angry driver is as much danger as a drunk driver. However, aggressive driving does not carry the social stigma that drunk driving does. It is time that it did; a dead person is just as dead whether killed by an aggressive driver or a drunk one.

Aggressive driving is unnecessary; it is just a habit, the sad this is, it has become accepted as the norm. Driving aggressively may only take five minutes off an average thirty-mile trip. Aside from the danger, there’s the mental stress, the wear and tear on the vehicle, and the gas wasted. Is it really worth it?

In spite of this, it has been proven that experienced cyclists are still safe because they become street smart, and ride defensively. Just as good, defensive drivers stay out of trouble. Inexperienced riders need to seek advice on safe riding practices, and get out there and ride. Like all skills there is no substitute for actually doing it.

It is a myth that cycling is dangerous, and car driving is safe. That seat belts save lives, because indirectly seat belts have lead to more deaths due to unsafe driving practices. However, we cannot go back. Making seat belts optional would claim more innocent lives, and would not stop aggressive driving.

I will go out on a limb here and state that it is also a myth that helmets save cyclists lives, because it is mostly the experienced bike riders who wear the helmets. It is experience that protects a cyclist’s life; but like the seat belt situation, we cannot go back. I for one will continue to wear my helmet.

Read the BMJ article here

Friday
Jun132008

Looking one way, driving another


A cyclist is about to ride across a busy main highway; there are two lanes westbound, and two lanes eastbound, with a center median or possibly a turn lane.

There is no traffic light, and only a two-way stop; cross traffic does not stop. The cyclist’s plan is to wait for a gap in eastbound traffic, then ride halfway to the relative safety of the center median.

At the same time the cyclist arrives at the south approach stop sign, a car arrives way across on the opposite north side. The car driver plans to cross over the eastbound side and make a left. He does not see the cyclist because he is looking to the left for westbound traffic. (Top picture.)

There is a gap in traffic so the driver does a rolling stop and continues across the two westbound lanes. He still does not see the cyclist because he is now looking to the right for a gap in eastbound traffic.

Meanwhile the cyclist saw a gap in eastbound traffic, and also did a rolling stop. This is his first big mistake and things will only get worse from this point on. He is now in the middle of a two-lane highway and he sees the car for the first time. (Picture below.)


The cyclist is completely screwed at this point, he cannot stop in the middle of the highway with traffic bearing down on him at 60 mph. He should be waving frantically and shouting at the top of his lungs, trying the get the driver’s attention.

The car driver has still not seen the cyclist because he is continuing to look to the right. The driver has seen the same gap in eastbound traffic that the cyclist saw, and he starts to accelerate.

He may glance forward to the southbound approach, but sees no one there because the cyclist has left that spot, and in all probability is in the driver’s blind spot caused by the door pillar and his driving mirrors. The driver is already turning while accelerating, still not looking ahead, and will only realize the cyclist is there when he runs over him. (Below.)


Who is at fault? The car driver of course for failing to see the cyclist, but this is of little consolation the cyclist at this moment. This is sloppy and aggressive driving that is all too common on roads to day. However, cyclists cannot afford to be sloppy.

Had the cyclist come to a complete stop and assessed the whole situation before crossing he would have seen the car on opposite side. He should have not only been looking for a gap in traffic on his side, but also looking at the traffic on the opposite westbound side.

If there was westbound traffic, this would be his safety buffer and the car opposite would not pull out and he would have time to get to the center median.

If the car starts out from the opposite side at the same time the cyclist does, there is no way the cyclist can beat the car to the center. Cars are faster, and the above scenario is very possible.

Don't count on drivers using turn signals; don't assume a car is going straight just because his turn signal is not on.

The cyclist may miss the gap in traffic, and have to wait a little longer, but let the car drivers be in a hurry, a cyclist cannot afford to rush.

Vehicles turning in front of cyclists is the most common bicycle/vehicle accident on roads today and will continue to be if people drive in one direction, while looking in another.

Sloppy, bad driving is not going away anytime soon, so always be on the lookout for situations like this one. Think ahead, ride smart, and ride defensively.


Footnote: Written for US readers. For UK readers and others who ride on the left side of the road, read left for right, and right for left. If possible, copy the pictures and flip to a reverse image.

Readers have asked me in the past, what do I use to make the drawings? I use MS Visio for the line drawings, save the picture as a JPEG, then fill in the colors with Photoshop.


Sunday
May112008

Fear and Negativity: Don’t even think about it

Before I posted my last piece about the Australian road rage incident, I faced a dilemma; should I post the story or not. Most times, I shy away from posting negative articles.

However, I decided to go ahead, because I knew others would run with the story anyway. I felt that bringing a story like this, involving high profile riders, to public attention might cause others to think twice about the seriousness of doing something similar.

It was never my intention to strike fear into cyclists. Fear is one of the basic instincts we share with all creatures of this earth. Fear of death or injury ensures survival of the various species.

Politicians and the media play on this primal instinct to benefit their own ends, with negative advertising and negative reporting. However, I see a difference between reporting something that actually happened, as opposed to discussing what could happen. The media does this all too often.

Do you remember Y2K and how all kinds of terrible things would happen at the stroke of midnight on January 1st. 2000. That time and date came and went and nothing happened, and the media moved on to find other items to scare us.

Whatever happened to the Bird Flu? Did it suddenly disappear, or did they find a miracle cure? Because a few short years ago we were all going to catch this terrible disease, old people and children would die from it. It was spread by birds and mosquitoes, those little critters are everywhere.

I quit watching the news on TV because it is so negative and depressing, and the terrible thing is it is not news. At worst, it is fiction; at its best, it is irrelevant issues grossly exaggerated and blown out of all proportion.

I get the news I need from the Internet; and I often see the same negativity there; however, I can be selective in what I read.

The problem is, being constantly fed a diet of fear and negativity; it creeps into people's lives and their everyday thinking. We speculate on the worst that could happen.

I see it on the various bike forums and blogs, where cyclists recall the near misses, and their run-ins with aggressive drivers. The problem is, the person posting is re-living the event, and causing others to re-live their bad experiences. We cannot erase bad events that have happened in the past, but we can learn from them and move on.

Is it any wonder that some, who would ride a bike, are afraid to ride on the road? A person might wonder why anyone rides there at all, if it is that bad. The truth is it is not that bad, if you look at the situation from a more positive viewpoint.

A few years ago, lived a wise and holy man from India named Sri Nisargadatta. During the 1970s he gave interviews with anyone who cared to sit with him and ask questions. These interviews were recorded, then translated into English, and published in a book called “I am that.”

Many times throughout the book he is asked, “How do you feel about all the wars, death and destruction around the world, and what about all the disease and suffering?" He would always answer, “This is in your world, not mine.”

On the surface this seems a somewhat uncaring attitude, however, I can understand this answer, having just read an online post by a cyclist. The writer asks why the hatred from other road users, why do they scream abuse at him, throw trash at him, and try to run him off the road?

The cyclist is from another state in the south, not far from South Carolina where I live. How different can drivers be, between the two states? Yet none of these terrible experiences he relates, ever happen to me. Like Sri Nisargadatta I could answer, “This is in your world, not mine."

The difference is, when I set out for a bike ride I do so with a positive attitude and I am not expecting the worst will happen. I go riding with the attitude that most people on the road a simply a cross section of the population and for the most part are inherently, good, decent people. Only a tiny minority are criminally inclined, and malicious.

We all know that many drivers are inattentive, however, they are not inattentive 100% of the time, so the chances of them being distracted at the precise moment they pass me is remote. In other words, the odds of my not being hit are far greater than being hit, so why should I dwell on the thought that that a slight possibility might occur.

Most successful people believe in the power of positive thinking; the problem is negative thoughts are just as powerful. We attract to ourselves whatever we hold in our thoughts. A person riding a bike with the attitude that all drivers are morons will attract the behavior they expect.

It is natural to have negative thoughts and to fear the worst, not only are we bombarded with negativity from the media, we get it constantly from work colleagues and those around us; plus as previously mentioned, fear is a basic instinct.

However, as humans we are capable of rationalizing, and do not need to live our lives in constant fear. We are all freethinking spirits and we do not have to dwell on the negative.

Something else I have learned; the things that annoy me as I go through life have a tendency to keep repeating. I try to recognize these re-occurring annoyances, observe them as such, but try not to get angry. After doing this a few times, the annoyance stops re-occurring.

If bad experiences are happening to you every time you ride, realize these bad incidents involve different people. The only common denominator in these totally random incidents is you.

There is a tendency to find whatever we look for. If we look for the worst in people, this is most likely what we will find. Turn that around and realize that there are more good people in this world than bad.

I try to fill my mind with good positive thoughts before I even set out on a ride; I have no control over the thoughts and actions of others, only those of my own.

I don't worry if negative thoughts slip back in, because I know they will. I am conscious of these thoughts and replace them with a positive one. A positive thought will always cancel out a negative one, as surely as light will overcome darkness, and good will overcome bad.

If you are skeptical, try it anyway; what have you got to lose? Just your bad experiences.

Monday
Apr282008

Cyclists live longer

The chances of being killed on a bicycle are less than the odds of dying in an automobile.

Statistics actually confirm the statement is true; that is, with the exception of one. When comparing the fatality risk by miles traveled, every one million miles cycled, (1.6 Million Kilometers.) produces 0.039 cyclist fatalities, compared to 0.016 fatalities for motorists.

Both figures are very low but it would seem in this straight up, mile for mile comparison, that cyclists are more than twice as likely to die on a bicycle than in an automobile.

However, this statistic is flawed to the point that it can be ignored, for the simple reason it would take a cyclist riding slightly under 385 miles per week, 50 years to ride one million miles.

Most of us will never come close to that kind of cycling mileage; 500,000 miles in a lifetime would be very good. Compare this to driving, and we all know how relatively easy it is to put 100,000 miles on our car speedometer, two million miles in an automobile in a lifetime is not unreasonable.

When you consider the lower mileage covered in any given year, the chances of a bicycle fatality are greatly reduced. This is confirmed in another statistic that compares hours cycling with hours driving.

For every million hours spent cycling the fatality rate is 0.26, compared to 0.47 deaths per million driving hours. Therefore, driving a motor vehicle has nearly twice the risk of fatality as riding a bike for a given duration.

If you rode your bike non-stop for 114 years, which is one million hours, your chances of being killed on the road would be roughly 1 in 4. In that same period, your chances of dying of natural causes would be at least 99.999%.

Another statistic compares fatalities per million people. According to the US National Safety Council, for every million cyclists in the US, 16.5 die each year, whereas for every million motorists, 19.9 die each year.

How about the chances of dying as a result of injuries from a bicycle accident? One would suppose that crashing on a bicycle has a higher risk of death than crashing in a motor vehicle, but according to the NHTSA, bicycles compare rather well.

The odds of dying from a bicycle crash are 1 in 71. This compares to 1 in 75 for an SUV, truck or van, 1 in 108 for a car, 1 in 26 for a motorcycle, and 1 in 15 for a pedestrian.

In other words, the odds of dying in a bike crash are about the same as the odds of dying in an SUV crash. The false sense of security that comes from driving an SUV tends to produce far more dangerous driving behavior.

Many cyclists fear being hit from behind. This type of accident only accounts for slightly over 10% of all bicycle accidents, and half of these occur at night when the cyclist does not have lights.

In 90% of cases where a cyclist is hit from behind, injuries were minimal. In explaining the high death rate when pedestrians are hit. A pedestrian hit by a car doing 40 mph, the pedestrian is practically stationary, and the 40 mph impact is directly on the body.

Whereas, a cyclist traveling at 15 mph, hit by a car doing 40, the impact is 25 mph if hit from behind, and it is often not a direct hit on the body.

The most common accidents occur in front of you, and by defensive riding, many can be avoided. These are, vehicles coming towards you and turning in front of you. Vehicles pulling out from side roads and driveways in front of you. Drivers passing you then turning right in front of you (The right hook, or left hook in the UK.)

Statistics confirm that you can also reduce your risk of an accident if you don’t do the following: Don’t ride on the sidewalk and suddenly appear in front of motorists at intersections, especially if you are going the wrong way.

The same goes for riding the wrong way on a one-way street. Motorists are looking one way and not expecting traffic from the other direction. Don’t ride at night without lights or reflectors is another obvious one that will greatly reduce your risk of an accident.

I can’t vouch for the accuracy of some of these statistics, and individuals must draw their own conclusions. For example, in a risks per million hours of an activity comparison, scuba diving is 7 times more dangerous than cycling; however, a person is likely to spend far more hours cycling per year than scuba diving. How do you compare the two?

However, I think the figures are generally positive for cyclists. You can get out and ride your bike knowing the odds of survival are in your favor, and if you ride smart, your odds are even greater. Here is another one.

According to a study by the British Medical Association, the average gain in "life years" through improved fitness from cycling exceeds the average loss in “life years” through cycling fatalities by a factor of 20 to 1.

So you see, cyclists really do live longer.


Further Reading

Adult Bicyclists in the United States
Bicycle Almanac
Comparative Risk of Different Activities
Cycle Safely (RTH)
General Background on Bicycle Risks
Ken Kifer's Bike Pages: The Risk of Bicycle Use
Toronto Bicycle/Motor-Vehicle Collision Study (2003)

Wednesday
Apr092008

A short cycling safety video



I came across this California League Cycling Instructor's bicycle safety video via Philadelphia Bicycle News.

I had to smile at this quote:

“It's duly noted that these are very skilled, faster cyclists interacting with relatively polite Southern California motorists traveling at moderate speeds.”

I’m not sure about Southern California motorists being more polite than in any other state; they have been known to shoot at each other on the freeway on occasions. It’s been a few years since I lived in So.Cal, maybe the threat of gunfire has improved their manners.

Anyway, I digress. I think this short video is excellent and packs a lot of useful information in a few minutes. There was not much here that I didn’t already know, however, just the visual image of cyclists having some control over other road users around them made me feel good.

I realize the video has been edited to serve its purpose, but nowhere do I see the flow of traffic being hindered. The cyclists come across as polite but assertive, and viewers should note that had they just blown through red lights and stop signs, all credibility would have quickly disappeared.

There is a big difference between assertiveness and arrogance. Assertiveness is taking the lane after signaling and making your intentions clear. Arrogance is cutting in front of people, running lights and stop signs, and not only breaking the rules of the road, but breaking the rules of decent human behavior.