PermitToTravel
Established Member
From experience they're not positioned on the entrance/exit forcing you to pass through. At least not where I work. I guess smaller stations could differ. It's a persons right, even if not everybody likes it, not to walk through one, therefore you can't deny travel for this reason. Also, setting the sensor off isn't grounds for a search alone....another reason they're a tad pointless.
They're often deployed in football stadia or high schools, where entry will be denied to anyone refusing to go through the detector. I don't know why it's done differently on the railway, the voluntary approach doesn't sound like it has much benefit