You all seem to forget that cars get to sit in traffic and so perhaps they will have plenty of time to figure out what these signs mean.

I'd like to see an ad with a lady my sister saw on her commute the other day: Busy road, two fast-moving standard traffic lanes, 1 well-marked bike lane. Steep hill. A woman in a huge SUV is pulled over to the 'side of the road' talking on her cellphone, that is, she's blocked the entire shoulder, the bike lane and a portion of the lane to the left of the bike lane.

It seems to me that pictures of people doing dangerous things might make more of an impact, with a simple, clear reminder to give 3 feet of space.

Anne