your unsourced numbers for roads are wrong and at best representative of a rural area single lane mile not a 4 lane highway. Here are some better numbers for different places and types of roads:
one city on the front range that isn't even in the colorado river watershed is hardly indicative of the snow pack / snowfall inside that watershed. The inflows into lake Powell are a much better equivalent for the entire watershed and do show a decline. https://graphs.water-data.com/lakepowell/ though that doesn't show diversions / how much is being caught in upstream reservoirs. and the snotel graphs for the watersheds in the colorado basin are a much better source https://www.wcc.nrcs.usda.gov/ftpref/support/states/CO/produ...
I chose Boulder as it has very good record keeping(and it goes way back) and is a good bellwether for the state, plus a number of key government climate labs are based here. So its a solid data point. If I had more time I would crunch numbers from a array of other cities like Breckenridge, Aspen, Colorado springs, and Grand Junction, the former two may or may not have great data from before the 1950s'.
So the neighbors who where there first also don't have any parking in their buildings? Only the new residents should be required to park thier cars off street? I fail to see how that is justifiable.
As someone who experienced heart attack like symptoms as an under 30 year old, did go into the hospital and got a pericarditis[1] diagnosis, I think that describing your friends unknown heart condition as a heart attack is unnecessary fear mongering considering similar symptoms can present themselves as a much less severe condition. Both the Vaccine and Covid are known have a low chance of causing heart issues.
I'm not a doctor, so maybe there's some deep difference between something that has the same symptoms as a heart attack and a heart attack. Regardless of what exactly it was, it freaked him out, it freaked me out too and I'm glad there doesn't seem to have been a recurrence (or if there was he chose not to tell me, knowing that I'd tell him again to see a specialist).
"Both the Vaccine and Covid are known have a low chance of causing heart issues."
It is 'known' by people who are deeply conflicted by their own pushing of the shots and could thus never admit it, if their policies had led to immune or heart damage. Nothing much can be said about vaccine safety given that the public health and research system are clearly terrified of doing or saying anything that might reduce compliance with their policies.
https://www.fhwa.dot.gov/policy/23cpr/appendixa.cfm (scroll down a little ways)
so your reference for freeway is likely using a single lane number not the actual cost of a 4 lane high way which would be 12 - 80 million per mile.