Cycling with Cars: Riding Defensively

Many new cyclists or cyclists who are thinking about using their bike to commute to work are anxious about riding in the road with traffic.  It’s not as scary as it looks and in many circumstances riding with cars is actually safer than riding in segregated bicycle lanes or what are euphimistically called “bicycle paths”.  If you’re going to be at all serious about road cycling or are going to commute to work you are going to have to share the road with cars.  How to ride a bike in traffic can be a controversial topic that generates discussions informed by passionately held ideologies and beliefs.  The advice and opinions expressed here are based on many years and tens of thousands of miles spent sharing the road with cars.  I ride with cars every day and I don’t want to be killed, maimed or seriously injured on the bike.  These are some of the ways I’ve found to most effectively accomplish those things.  Keep in mind that there are no hard and fast rules about riding in traffic.  You have to evaluate and adapt to each situation separately.  Riding safely with cars involves riding defensively and riding the line, among other things.

Riding defensively boils down to always being aware of where the cars are and what they’re doing, and knowing about, and being on the lookout for, the situations that most frequently lead to collisions between cyclists and motorized vehicles.  If you hit a car or a car hits you, you’re going to lose almost every time.  It doesn’t matter who was right and who was wrong and it doesn’t matter how much of a hardass cyclist you think you are.  What matters is physics.  Cars have a lot of mass and you don’t.  That gives slow moving cars a lot more momentum than fast moving bicycles and that means the cyclist loses.  Don’t want to get hit?  Recognize the circumstances in which cars hit bikes and avoid them.  Ride defensively.

Intersections.  Intersections of any kind – cross streets, side streets, traffic lights, parking lot entrances and exits, driveways and so on – can be dangerous for cyclists and an entire post could be devoted to them. 

Here I’ll only discuss one particular type of collision that can occur in an intersection; the car makes a right hand turn and hits the cyclist who is riding through the intersection on the right hand side of the road.  This is widely thought to be the most common way a car hits a cyclist in urban settings.  Washington DC, where I live, was reminded of this several days ago when a young woman commuting to work on her bike was hit and killed by a garbage truck turning right.  Drivers may be looking for pedestrians in a crosswalk when they turn right at an intersection but they usually aren’t looking for something going as fast as a bicycle moving past them on the right.  Whenever you are in a situation where a driver may turn right, watch for it.  What do you watch for? 

Directional signals.  Always look for a car’s flashing directional signals – never trust what you see.  Drivers will often turn without using their directional signal.  This can be expecially dangerous when they turn right.  Less frequently, drivers will signal a turn and then not make it.  You can sometimes read a right hand turn that is not signaled from the car’s front wheels.  Drivers who are stopped at an intersection and plan to turn right will sometimes turn the steering wheel while stopped to prepare for the turn.  Be aware of vehicles that swing left before they turn right.  A slight jog to the left can indicate the vehicle is going to turn right. SUV drivers tend to drive like this.  Always be wary and alert at any kind of intersection and never take a car’s movement path for granted.

Parked cars.  I mentioned this problem in the post about riding the line.  When you are passing cars parked along the side of the street, always try and see if there is someone inside the car.  If there is, approach the car with care because they may open the roadside door suddenly to get out of the car.  People in cars look for oncoming cars but they almost almost never look for cyclists before they open the door.  Sometimes they open it just as you go by and knock you over out into the roadway; sometimes the door opens a split second before you arrive and you smash into it and catapult over the handlebars. 

Some people recommend that you ride far enough out in the traffic lane so that opened doors won’t touch you.  However, this can be impractical if there is a lot of traffic, especially fast-moving traffic, on the road.  You can ride close to the parked cars without hindering traffic as long as you’re vigilant and careful.  If you see someone in a car, slow down as you approach.  This gives you more time to see whether they look like they’re preparing to exit the car or just sitting there waiting.  It also gives the person in the car more time to see you.  If their window is open, call out that a bike is approaching.  If there is someone riding behind you, call out “Person in parked car” so the other cyclist knows to be careful.

Underestimating your speed.  If you are riding fast, drivers will consistently underestimate your speed.  The faster you’re going, the more of a problem this can be.  I’ve seen this happen time and time again.  A driver is pulling out of a side street, they see you coming, they start to pull out anyway and then jam on the brakes in a panic when they realize you’re right on top of them. 

This happens so frequently because of the way people identify objects in the environment.  We take in information from the world around us and use bits and pieces of it to identify objects like “car”, “tree”, “guy on a bike”.  We then fill in the bits and pieces with what we already know about these objects based on our past experience.  For example, when you see a car you process just enough to identify it as a car and then use what you already know about cars to formulate a prediction about what it’s going to do next.  It may turn right, it’s unlikely to jump up on it’s hind wheels and salute as you ride by.  People see you riding, identify it as “a person on a bike” and predict your speed based on what they know about bike riders.  If you’re going fast, most of the driver’s experience has been with slower moving bike riders.  Based on their prior knowledge and experience they are likely to underestimate your speed. 

Underestimating your speed can be a problem in two situations.  The first is any time a car is going to pull across your line of movement either by coming out of a side street, driveway or parking lot entrance or by turning left across oncoming traffic.  The second is when you’re going straight on a road that has a right hand turn lane leading to an access ramp to a cross street.  You are riding the line separating the through road from the turn lane because you’re going straight.  Some idiot is afraid to pass you on the right in the turn lane and decides to pass you on the left in the through street and then cut in front of you onto the ramp.  You’re going faster than they think and they make a screaming high speed turn in front of you or jam on the brakes in a panic stop when they realize they’re not going to make it.

Learn to recognize the circumstanes where underestimating your speed can be a problem and be alert.

Evaluate, predict, plan, adapt and execute.  When you’re approaching an intersection or any circumstance that might pose a problem for a cyclist such as a car parked on the side of the road, road debris or potholes that you must navigate around, or loss of the shoulder as the road narrows to go over a bridge examine the upcoming situation.  Are there any moving vehicles around?  Where are they?  How fast are they going?  What are the potential dangers for a cyclist?

Based on your examination of the current situation, predict what the circumstances will be when you arrive at the problem point.  Where will the cars be?  What will they be doing?  Might the car in front of you turn right?  Does that guy who wants to pull out of the parking lot look like he’s underestimating your speed?

Use your prediction to formulate a plan of what you will do when you arrive at the problem point.  Should you slow down to hit the intersection after the only car you can see has gone through it?  Speed up to get there safely before the car arrives?  If you speed up or slow down are you going to be in trouble if the guy makes an unsignaled right turn?

Constantly reevaluate your plan as you approach the problem point and adapt it to changing circumstances.  Vehicles moving faster or slower than you first thought?  Pedestrians or cars appear that you didn’t see before? 

When you hit the problem point, execute the plan.  Getting to the problem point and then dithering about what you should do can be dangerous because any cars or pedestrians in the area may have been formulating their own plans and when you do something unexpected at the last instant because you lost confidence it can mess everybody up and lead to accidents.

Use your ears. In order to ride defensively you need to be aware of what’s going on around you.  You can see what’s in front of you.  You can see what’s behind you as well if you turn around and look.  However,
Dumb Ass

I'm a Dumb Ass

looking behind you and continuing to ride a straight, sure line takes practice and you can’t be looking behind you all the time.  Make use of all the information available to you, both visual and auditory.  Listen for cars or bikes coming up behind you.  Learn to estimate their speed from their sound.  Know when they are going to pass.  Never wear earbuds and listen to your iPod on your bike like the guy in the picture on the left who not only has earbuds but special shields to block out external noise so he can hear his iPod better.  Wearing earbuds on a bike is like having “I’m a dumb ass” tattooed on your forehead.

Know your route.  Whether commuting or training, most riders ride the same route time and time again.  Learn your route.  Know where the danger points lie and be prepared for them.  Learn where the bad sections of pavement are that narrow your options of where on the road you can ride.  If you go through an intersection with traffic lights, learn the signal pattern so you can accurately predict what state the light will be in when you arrive.  Is it a smart light that responds to waiting traffic?  Learn the typical taffic patterns at an intersection.  Are right hand turns frequent or unlikely?  The more you know about your route, the better your chances of accurately predicting what will happen when you arrive at the danger points.

Aggression, timidity and defensive riding.  Riding defensively doesn’t mean you can’t ride aggressively.  The agressive rider who thinks everybody is looking out for him and he always has the right of way is a danger to himself and everyone around him.  The cyclist who rides hard and fast is often easy for drivers to predict and if she rides defensively as well, she’ll avoid potentially deadly situations.

Likewise, riding defensively doesn’t mean you should be a timid rider.  Accurately predicting what the situation will be when you arrive on your bike is an important part of riding defensively.  Just as you are predicting where the cars are going to be when you get there, they are predicting where you are going to be. Timid, frightened riders who lack confidence are more likely to do unexpected things, are more difficult to predict, and often make their ride more dangerous than it needs to be.  Be aware, don’t be scared.

Riding defensively is all about learning to recognize the circumstances that pose a danger to the cyclist and learning to predict when those circumstanes might occur in order to minimize the danger as much as possible.  You can recognize a potentially dangerous situation 1000 times and nothing bad happens.  It’s easy to lose focus, to lose awareness, to take it for granted.  Bad idea because the 1001st time might be the one that saves your life.

7 thoughts on “Cycling with Cars: Riding Defensively

  1. Pingback: Cycling with Cars: Riding the Line « Tuned In To Cycling

  2. Very true – i myself was recently involved in an accident when a truck pulled into a parking lot while i was riding next to him. While i came out of the accident with only some muscle sprains in my leg, i have a new appreciation for cars and their potential for damage. Accidents can often be avoided by us bikers watching for them because no matter how good the driver, it is too easy to not see a bicycle.

  3. Pingback: Corpus Christi Cycling Newsletter Issue 1 « Corpus Christi Cycling

  4. really enjoying your blog!
    I live in a rural area and tend to stick to actual paths away from cars (converted rail lines) but to get to those paths and back I have to deal with traffic. I use IEM’s with my iPhone while riding and they are actually a custom mold of my ear, which means they seal perfectly and are totally noise isolating. which would make you think I need to wear the “I’m a dumbass” sign. However, there are a few really good apps available that essentialy keep the microphone, which is located about 6″ below the ear, on at all times on a trigger so that at a pre-set decibal level the microphone kicks on and you can hear any noise, cars, people screaming etc! sooooo not all riders who have headphones on are dumbasses, well at least not for that reason!
    thanks again!

  5. Excellent advice, adapting it to the UK, where we drive on the left and left turns are a problem would be helpful. You’ve rightly emphasised the most important thing, it doesn’t matter who’s right, the cyclist always loses.

    I recently had my bike serviced and I’ve found I’m often moving as fast as moving cars, 20-30 mph. I’m finding I like to adopt a road position in the centre of the bumper (fender?) of the car in front of me, does this seem sensible? I get the impression that cars behind me are trying to overtake, the unwritten rule is that a car should always overtake a bike, I’m finding that a glare or a back off hand motion does the job, but I’m new to this, and only time will tell if it works, what do you think?

  6. I remember the old saying, helmets on headphones off. I’m from south Florida where there are a lot of retired people driving most of which shouldn’t be so I’m used to being defensive. The best tip I would give is never assume the drivers can see you, assume they don’t. Another thing is I don’t hug the line on the right side of the road, I take at least two feet into the lane and make the cars pass me as if I was another car. If they honk I move more into the lane. When I first started out cycling I was hugging the line on the right and someone’s mirror nailed my elbow and I almost did a face plant but luckily I still had control of the bike.

  7. I have a story about not wearing headphones. I was riding just after a hard rain. All of a sudden I heard a car sliding behind me. I looked back and then I put some pressure on the brakes and went to the right. There was a lady driving with a child in the back and she must have been distracted, looked up and saw me and whipped the wheel which caused her to slide. She went past me and the car went up over the sidewalk onto the grass. If I would have had headphones on I wouldn’t have braked and she probably would have hit me. I don’t need headphones because I have a full library of songs in my head and certain ones help me keep the pace I want.

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