The other thing I should mention is that these lanes (and similar ones on 17th, and I bet others on other high streets) should just be converted to full-time parking. Right now, they are signed for no-stopping during rush hour (the left photo above is southbound, so it's no stopping from 3:30 to 6 PM). I assume this is an old traffic engineering 'solution' to try and keep traffic moving during the rush hour. But there just isn't the demand; 4th St SB at 20th has 525 southbound vehicles in the PM peak hour (it had 650 vehicles 35 years ago (!)). That can easily be handled with a single lane. In fact, it often is -- the last couple of summers, patio extensions have closed sections of the curb lane permanently so they aren't used. And even in winter; on a recent walk around 5:30 PM, I noticed that there was a car stopped in almost every single block on 17th; some of them were delivery drivers with their lights on, some were just parking early.
So the lanes aren't needed for traffic flow, and even if they were, they currently aren't available for traffic flow -- since drivers are stopping in them, you can't drive through for more than a block or two anyways. The businesses in the area always want parking, and I can't imagine that getting your car towed is a good advertisement for patronizing a BIA. (I saw three people get their cars towed the last time I caught happy hour on the Earl's patio.) So it's not helping businesses and it's not helping through drivers, and more traffic isn't helping pedestrians. The tow truck drivers don't need help that badly.
There might be a few spots near intersections where a restriction of a couple of car lengths is appropriate to permit right turning vehicles a place to wait for pedestrians without blocking traffic flow, and it might be a good idea to start putting a couple of ten minute stopping zones every couple of blocks to help delivery drivers.