I observed what could have been a very serious accident this weekend, as in getting someone killed.

A careless biker towing a child on one of those third wheel add-ons started to cross a street with a marked bike lane and did not notice someone coming along in the bike lane at high speed. There were others crossing, other bikes in the bike lane going different speeds, kids, groups of cyclists, whatever. Fortunately there were no cars in the street at the time and the fast biker was able to avoid a collision by a small margin. I would guess the guy in the lane was coming down a small curving hill at about 20mph+.

Now the issue here is that one idiot made a really bad mistake at not looking out for traffic properly but also that another idiot insisted on maintaining full speed into a zone crowded with people at an intersection where many bikers and pedestrians cross from a MUP across a N-S street to head E on a street that originates E bound in a T at that intersection, that is major bike route, auto route, flanked with sidewalks and so on. The fast biker was S bound in a bike lane on the N-S street and has right of way. All of this on a very pleasant Sunday afternoon. None of the bikes, walkers, or cars have traffic controls except a stop sign on the E-W street that stops W bound traffic from entering the N-S street, a factor irrelevant to the possible accident.

The point is, right of way or no right or way, excessive speed for the conditions is very dangerous. Approaching an intersection crowded with crossing bikes and pedestrians including parents with children, dog walkers, etc., etc., justifies slowing down even for those who have right of way.