That's what slowing to a crawl is supposed to minimize. Not even coming to a full stop can prevent all accidents. There's no cure for the the blind/drunk/distracted/texting driver. They'll change lanes into other cars on a road with no stop signs, and on roads with them they can fail to see the sign entirely.

But if you've stopped and turned your head to look down both sides of the street instead of relying on your peripherals that suck at detecting changes in motion, you've done yourself a huge service in not getting hit.