Recently while both cycling and walking I have noticed a preponderance of motorists failing to even hesitate when entering from a side street, or a driveway... somewhere in their minds the idea of a quick glance seems quite sufficient and off they go. (this has happened to me now 5 times in the last week and a half-- I would call that a "preponderance." Once while walking my dog.) BTW I tend to ride these local streets very center biased.Her bicycle collided with a truck driven by a 46-year-old Kirkland man as he was leaving a store parking lot.
I had one gentleman (I use the word quite loosely) run a stop sign, at speed and then slam on his brakes... while I too came to a screeching halt and yelled "stop sign!" and pointed at the thing. His response included the F bomb and off he drove. There was a woman on foot approaching from the other direction... she too was quite taken aback. The other situations involved motorists exiting a side street or mall and then getting well out into the lane and slamming on the brakes and then invoking a sheepish "sorry."
While I would like to think I could confirm that I have been seen in such situations, I have seen that the hurried motorist simply assumes the road is clear... perhaps because it is a less used road or exit (in the case of a shopping mall) and they just blast right through.
The only solution seems to be to assume no one is going to stop and slow down and prepare to stop yourself... yet this seems to give motorists the impression that you are stopping for them.
I believe this situation, of motorists not even hesitating, is perhaps what killed the young woman, mentioned earlier here on BF.