bike lane or path has a vehicle capacity of about 2,000 bikes per hour per 3 feet of width (this is the low-end of observations). A 6 foot bike lane has the capacity to move 4,000 people per hour
So some basic math estimates would be ~46m based on a linear scaling to 100k per hour (50k each direction), but this is based on a low estimate and probably would scale non-linearly. I think something like the bus width is more accurate estimate. The other thing to realize is that bikes are a more fluid form of traffic and therefore benefit from a connected grid of paths to diffuse traffic congestion. So more paths in a network would also scale very efficiently.
Adding this famous comparison photo, bikes are not as dense as a bus, but pretty close.
https://www.bikeathens.org/hate-congestion-support-bike-lanes/
So some basic math estimates would be ~46m based on a linear scaling to 100k per hour (50k each direction), but this is based on a low estimate and probably would scale non-linearly. I think something like the bus width is more accurate estimate. The other thing to realize is that bikes are a more fluid form of traffic and therefore benefit from a connected grid of paths to diffuse traffic congestion. So more paths in a network would also scale very efficiently.
Adding this famous comparison photo, bikes are not as dense as a bus, but pretty close.
Nice - bringing some numbers to back up my gut reaction.