I was watching a video by RMtransit on at grade rapid transit systems with grade crossings and absolute priority.
Link for those interested here: https://youtu.be/ul0VTTrP6B8
This got me thinking, given the possibility for huge cost savings from not grade separating rail lines (LRT is usually about thirty-ish million versus upwards of two hundred million to over half a billion per for something elevated or tunneled), how frequent could trains be before you’re effectively closing all cross traffic?
Given subways level frequencies of 3-4 minutes, you’d probably have a train coming through the intersection every two minutes and you’d probably have the crossing gates down for about a minute, that means that roughly you’d have it closed down about half the time. Idk if that’s reasonable.