Recently, we asked our readers to list the most frustrating cycling habits on display on Toronto's streets. The social media and comment thread response was, as expected, very strong. Drivers, bikers and pedestrians alike told us how cyclists riding on the sidewalk, running stop signs and red lights, failing to wear helmets, and riding dark at night gets their blood boiling.

In the interest of fairness, we thought we would let other road users have a chance to detail which faults of bad drivers make moving around the city slower, harder and more dangerous for everyone else. Let's be clear, though - this isn't an attack on drivers or driving; it's a chance to voice concerns about dangerous, illegal, or just plain inconsiderate actions by a small group of people behind the wheel.

It's also worth noting that, unlike other road users, drivers are the only group required to hold a valid license before leaving the driveway. Many cyclists hold a driver's license too, but judging from experience and today's response it doesn't seem as though testing is the perfect antidote to mistakes and rule breaking. If you're looking for driving tips, the Ontario Ministry of Transportation has some good information.

Our Twitter followers had a chance to speak out earlier this morning and now it's your turn. Maybe it's blowing past open streetcar doors, no signals, bad lane changes, or aggressive behaviour. Let it all out in the comment section below.

Photo: "Downtown Traffic" by Daily Grind Photography in the blogTO Flickr pool.