Si Americano I get that UK prob have more competent rail than US (not saying much) But I'm thinking practically You build some huge walkover bridge You buil

Si Americano I get that UK prob have more competent rail than US (not saying much) But I'm thinking practically You build some huge walkover bridge You build a massive fence along... how long a segment of track to prevent any large-ish living things from crossing it? Kids tear down the fence so they can cross The fence becomes yet another barrier between neighborhoods It's prob super ugly And all of this is done for the benefit of locals along the tracks? No Its done to allow speeding rail commuters access to what is rightfully theirs -- unconstrained ability to haul ass through all these neighborhoods without regard for the safety of the people who live there Slow down the trains? No way -- those are important people on those trains