What does improper observance of stop sign mean?
Improper observance of stop sign means not coming to a complete stop at the stop signs or not seeing one it you pass the stop sign.
Let's identify first what a Yield sign is. The Yield sign is the only sign on the road (US) that is in the shape of a upside-down triangle with rounded corners, similarly to the stop sign, the stop sign is the only sign on the road that's in the shape of a octagon (has 8 sides). You'll usually see a Yield sign at an intersection, for instance traffic circles. You're not required to stop at…
Who is at fault if you have entered the intersection from the stop sign and the other car hits you after you are almost through the intersection?
The word "STOP" means to cease movement, to halt. That's what you do when you drive up to a stop sign. You then look in every direction and calculate whether you can safely pull out into traffic, and wait until you can do so without causing anyone else to have to slam on their brakes or swerve out of your way.