[thmstcls]

Are fire hydrants so close together in some places they make a significant amount of parking unusable?

[freeone3000]

Every fire hydrant is thirty feet of unparkable space. Some streets "double up" by putting them at intersections (so it's only ten additional no-parking feet), but that's enough to fit three or four cars.

[cameldrv]

It seems like there's usually about one per block. That's at least a couple percent of street parking spaces.