> I rarely if ever see cars parked on the sidewalk.
Here in New York the police often park on the sidewalk--fully or partially--to the point the police have painted ranks on them in some precincts.
Here are a few Google Maps examples of our police parking on the sidewalk:
https://goo.gl/maps/4CkLXhajuiG2
https://goo.gl/maps/1i5NMhjJS1v
https://goo.gl/maps/2zT2vHyMkk22
https://goo.gl/maps/nikFJgyb9tj
https://goo.gl/maps/7ciEWeJd1Wq
https://goo.gl/maps/CFtp7oVvomB2
https://goo.gl/maps/Tc3vfhMp5mN2
Look up most police precincts and you'll see this sort of behavior. It's not limited to police, of course; the city government engages in widespread abuse of sidewalks as storage space for vehicles.
And it's not limited to the government, either; I know a number of restaurants that have valet parking where the valets will at best double or triple park cars--including in the bike lane--and at worst park on the sidewalk. All this a few blocks from the police precinct. Sadly, Google's street view cameras came by at the wrong time of day.
This understates the impact of cars on sidewalks, however, as historically many New York streets and avenues had wider sidewalks before we introduced street parking.