I would and have never let my kids play "in the street"...it's for vehicles, etc., not a "play area". Whenever I see kids in the middle of the street, I stop, get out, and tell them to get out of the street! Some parents really don't care. Kids need to stay in their yards, on the sidewalk or at the park.
I've seen kids, 1-2-3 yrs. old in the middle of the street playing!
It's up to the parents to enforce this upon their children. And several times, when driving thru a subdivision or an apt, complex and I see kids in the street, I find the office and tell them about it. Same thing for animals.
Parents should also teach their kids "how to cross the street", deaf or not. I remmy my youngest, at 6 yrs. old, would just "run across the street" without looking both ways....After a week of being grounded, and coming in to tell me his ball (or whatever) is across the street, and I would go out and retrieve it, he finally learned.
It's still a great idea to have the signs "Deaf Child at Play". It makes drivers more cautious! Forbidding ur child from "playing and crossing the street" could save his life. Keeping them close to home also.