Obviously this could be problematic in many ways.
That said, we just lost a key section of riverfront greenway in NYC to years of complaints of people cycling too fast (both in inflated perception, and also in fact) through a busy and pedestrian-popular area. And yes, there have been incidents, if as often when pedestrians forgot that it was a shared area as when cyclists did.
Instead there's now a hilly, un-lighted, still pedestrian-popular 24/7/12 detour that's already starting to have its own recorded incidents.
As a result, many are calling for the original route to be restored with a speed limit. Dropping to say a 10 mph jogger's pace for a few hundred level yards is far better than the detour or walking through, the challenge is getting from the old anything-goes behavior to a speed limit being honored, and convincing city & park government that such behavior modification is possible.
If a city is going to go the speed limit route, making them location specific in the way automobile speed limits are would make sense. Slow in the busiest areas especially at busy hours; hopefully also able to find some less pedestrian critical areas that could have higher limits for fitness cycling, or not need to have posted limits.
Last edited by UniChris; 06-28-19 at 07:36 AM.