1. Carelessly
This is most of the problems. Drivers know the rules, but just aren't looking. A classic problem is for a driver to not do a shoulder check before taking a right and cutting off a cyclist.
2. Unknowingly
Many drivers just don't know the rules. A typical rule is the cyclist's right to occupy the entire lane when required to be safe. The behaviour that comes next is to try to drive aggressively because he genuinely believes the bike is taking a lane intended only for cars.
3. Intentionally
This is rare, but some cars will honk to scare cyclists, yell at them, throw things, etc. to make a point that they own the road.
All of these things make cycling less attractive to all but the most determined cyclists. Which is too bad... if there were more cyclists, there'd be fewer cars.
Cyclists, too, break laws in different ways.
1. Safely
If I ride the shoulder on a stretch of Carling, it provides greater separation between cars and bikes. And if a car needs to use the lane for an emergency as it is intended, it'd be more dangerous if I were on the road anyway. Cyclists also roll through stop signs in empty intersections. Biking on empty sidewalks. Things like that.
2. With the best of intentions
Sometimes, it seems like riding a sidewalk or biking through a crosswalk seems like a good idea. But it can confuse drivers and endanger pedestrians.
3. Recklessly
Not having lights for the dark or weaving in and out of traffic. But the ultimate has to be cyclists that whip through red lights, forcing cars to stop which endangers everyone.
Cyclists do not always understand these differences.
The most frustrating part of the cyclists' sins is that people lump them together. Not stopping completely at an empty stop sign is not the same as cutting off traffic. And it makes us all look bad.
Not having lights for the dark or weaving in and out of traffic. But the ultimate has to be cyclists that whip through red lights, forcing cars to stop which endangers everyone.
Cyclists do not always understand these differences.
The most frustrating part of the cyclists' sins is that people lump them together. Not stopping completely at an empty stop sign is not the same as cutting off traffic. And it makes us all look bad.
It would be good if the police could ticket the intentional and reckless law breakers.