Let's start with the fact that at least half of the sidewalks are not quite suitable even for ordinary pedestrians - what can we say about rather large ambulances. And the equipment of more or less high-quality sidewalks for the passage of emergency services, I do not myself at all I can imagine. Their expansion by almost 100% will simply be impossible, and alignment with the carriageway in height is unrealistic and, frankly, destructive. Ambulances require better roads with much more efficient city planning (for details, see the books on urbanism ). If everyone suddenly does not decide that the typical cities with squalid neighborhoods set up during the Soviet era need to be re-planned and rebuilt almost from scratch, then nothing will radically change. And if they do, it will take huge investments, re-industrialization and a lot of time.