[icey]

It's not just the number of cars causing issues; the number of roads with ad hoc lane closures due to ride sharing pick-ups and dropoffs makes a huge difference. Many three lane streets get choked down to one lane if a delivery truck blocks a right lane and a ride share blocks the left. It's very visible every rush hour in SF.

[hkmurakami]

In HK I believe that city centers have designated areas around town for taxi pickups for this reason. It seems to work quite well.