05-17-2019, 02:54 PM
(05-17-2019, 01:31 PM)timio Wrote: This happens at train stations next to roads as trains pull in. When the train stops, the arms go up until it's time to move again.
This is part of why I think taylortbb is right. For passenger trains which come on very long headways, the extra stopping of traffic is small enough that I don’t really care; also the potential hazard is more believable. For LRT I think it’s really an inappropriate application of rules that are made for heavy rail. But there is lots of that, as has been discussed here before.
There is no reason why there couldn’t be a signal that turns green only on request. The idea would be that requesting the green (either press an explicit button for that purpose, or switch to “forward” mode after being in “stop” within the station i.e., what currently triggers the crossing protection when they leave the stop) would trigger the crossing protection, and the light would go green once it is sufficiently engaged. For non-stopping express or out of service moves, they could press the button before entering the station, or the system could simply know that the move is non-stopping and trigger crossing protection as usual. Alternately, the LRV operators could use the white lights which inform them whether the protection is engaged to tell whether they are OK to go.