Wow, the tone of this is amazing to me. There's a brother and sister rider dead and we're somehow twisting this thing that it's just an accident. Most accidents aren't. Stop signs are pretty visible features on any roadway. Let me think, yep, I remember running one, nope that was a stop light, in the miles I've driven. So what you have is a choice made by a driver to not be attentive - damn the consequences - and motor down the road. So she killed a couple of bikers - it could of just as easily of been a child, bicyclist, wheelchair bound person, et. al.
I think better than 1/2 the states now have right of way violation laws. While a small step, said laws are a step non the less. I think all states now have laws regarding harsher penalties, including jail time, for accidents in construction zones. These are, in my view, good laws. The notion that she only got a ticket and a $200.00 fine should and does just piss me off.