"Any given toilet" is doing a lot of work there. Governments actually know how much people generally need to go to the bathroom. In fact, in many places, you

"Any given toilet" is doing a lot of work there. Governments actually know how much people generally need to go to the bathroom. In fact, in many places, you can't get a license to host a large public event without providing toilets. But when it comes to public transit and downtown cores where that very same government has a very good handle on how many people are expected to be hanging around on an average/peak day, no need for toilets whatsoever!