Yield to Cross Traffic - there is a hierarchy to our road system. Yield to New Lane Traffic - you must negotiate to change lanes. Destination Positioning - your road position is a signal to all road users. Skidding - poor traction, i.e. alluvial sands in corners. Insufficient speed - lost balance, i.e. couldn't get foot on ground soon enough.
Cyclist fails to yield to cross traffic - going through stoplight or past stop sign.
Cycling wrong way - a very unpredictable behaviour. Cyclist fails to yield changing lanes - didn't negotiate to change lanes. Motorist turns left - first most common motorist caused collision, see below. Cycling on sidewalk - a common cause of children injury and death. Children don't understand that every driveway is an intersection and how to approach them cautiously.