Colin McKenzie wrote:

There was a crossing in Japan, though I can't recall where,
on about an 8-track railway, with frequent services on all lines.
The gate spent most of the time down, and if you tried to walk
across you didn't usually get to the other side before the start
of the next closure warning.

I would guess something like 60 tph overall.

"Wheeee! Let's play chicken with the trains!"
Not.

Surely an underbirdge would be more efficient?