nearly all these csts would be there even if private motoring was outlawed. salt would still need to be spread for the extra buses needed to transport people.
pollution may rise due to the extra buses etc. you can use statistics to show anything.
the road network would still be there, and a lot in towns would be cobbles - they are great for cycling on ( Paris Roubaix anyone

) so medical costs could well be higher.
if 1% of cycling accidents are caused by motorists/pedestrians that means 99% are caused by cyclists . that shows that cyclists are therefore more dangerous . and we know this to not be true
or the one that comedians trot out
40% of accidents are caused by drink drivers which means more (60% for the dummies who cant do maths) are caused by thse who are stone cold sober. that stat shows it is safer to drive whilst drunk.
see ,stats are rubbish for proving a point as they are all relevant to the point of observation.
i hae this "war" thing that a minority of cyclists have on motorists , the same as i hate the "war" motorists have with cyclists.
if each "side" all gave each other a litle more respect then roads would be a better place.
zero tolerance by the Police is a good thing IMO, but it needs to be applie to ALL road users EQUALLY . i.e if i go through a red light I should expect the same punishment be it a fine or points on a licence.