I think bicycle lanes are a perfect example of all this. They emerge as transport around the same time as cars, and are vastly more accessible for working class people to get around on (even today in many cases), but anyone who's gotten on one would laugh heartily at the idea that they have, in practice, equal access to the public arteries. They, along with pedestrians, are banned outright from the use of motorways - historically the most important and direct means of getting from one place to another. They're rendered vulnerable on normal roads by (the increasing size of) modern motors and regularly bullied by drivers with little recourse. Like pedestrians, they're regarded as an afterthought, with best practice being to provide a narrow path, usually poorly joined up, through a handful of areas where space can be found without inconveniencing drivers. The modern mess of cycling is down entirely to policy decisions which repeatedly prioritised the wishes of drivers over anyone else - and which are still being fought tooth and nail over.