2 big issues in my city help constrain affordable housing IMO, and both need to change. Proposals for both were both recently advanced and so far have been rejected.
Zoning: the vast majority of the city is zoned single family residential, and there’s a bit of NIMBY regarding higher density development. Recently, one proposal was to change all zoning within a half mile of a rail station to allow for small apartment buildings of up to 4 units, and up to 12 units if it was affordable housing. Sounded like a step in the right direction to me, but we need even greater density near rail.
The second was to eliminate some of the minimum parking requirements in residential areas.
I also agree that my city needs a lot of work on improving bike infrastructure with more protected cycle tracks. The huge size of many vehicles now makes biking on major streets increasingly dangerous. The city is better than it was 20 years ago, but cycle infrastructure is still woefully inadequate here.