And don't forget that a bike is least stable when starting and stopping, especially for unskilled riders. Having to come to a complete stop at every intersectio

And don't forget that a bike is least stable when starting and stopping, especially for unskilled riders. Having to come to a complete stop at every intersection can be more dangerous, not less, especially if there are cars approaching behind the cyclist: drivers are likely to roll through the stop sign themselves and pass the cyclist right as he is starting again.