I walk this road every weekend for fun. No pavements, yet I feel perfectly safe: https://www.google.pl/maps/@51.3167434,22.543053,3a,75y,89.33h,81.78t/data=!3m6

I walk this road every weekend for fun. No pavements, yet I feel perfectly safe: https://www.google.pl/maps/@51.3167434,22.543053,3a,75y,89.33h,81.78t/data=!3m6!1e1!3m4!1sc9xcYahDqisomBdIGkDwzg!2e0!7i16384!8i8192 https://www.google.pl/maps/@51.3167434,22.543053,3a,75y,89.3... cars go on it like 30 km/h cause it's so narrow. No need for any infrastructure. If the road is wide enough for cars to go faster - it's wide enough to fit pavement (one side at least). Pavement can be very narrow too - 1 m is infinitely better than no pavement. I've even seen 0.5 m pavements but that's stretching it :) If the road is so narrow you can't fit pavement there - it's probably safe already. But I've seen roads in USA and I think you just have no comparison on what "no space" means.