bulk88 Posted April 4, 2018 Share #1 Posted April 4, 2018 The L train had its legacy block signal removed after CBTC was installed. Most of the signal heads and trips were removed. I'll assume the shunted track blocks were also made much longer for reduced maintenance of the "AWS" (aux wayside signals). Documents show AWS is limited to 6 TPH on L. Is the Seltrac system on 7 going to get its legacy block signals removed the way the L got them removed? What about QBL Trainguard system, that supposedly is identical to L (but implementation spec for "mainline" CBTC instead of isolated L might be different)? Link to comment Share on other sites More sharing options...
trainfan22 Posted April 4, 2018 Share #2 Posted April 4, 2018 The wayside signals will stay on the as a backup in case CBTC fails. When CBTC fails on the they can't run service from Broadway Junction to 8th Ave due to the lack of wayside signals. Link to comment Share on other sites More sharing options...
kosciusko Posted April 5, 2018 Share #3 Posted April 5, 2018 35 minutes ago, trainfan22 said: When CBTC fails on the they can't run service from Broadway Junction to 8th Ave due to the lack of wayside signals. Wait, then what happens to the trains already between 8th avenue and Bway junction? Link to comment Share on other sites More sharing options...
Deucey Posted April 5, 2018 Share #4 Posted April 5, 2018 1 hour ago, kosciusko said: Wait, then what happens to the trains already between 8th avenue and Bway junction? http://gothamist.com/2017/09/21/mta_l_train_delays_rush_hour.php Link to comment Share on other sites More sharing options...
kosciusko Posted April 5, 2018 Share #5 Posted April 5, 2018 3 hours ago, Deucey said: http://gothamist.com/2017/09/21/mta_l_train_delays_rush_hour.php So you're either evacuating or you're getting comfortable. This seems like a pretty fatal flaw in the CBTC system. Link to comment Share on other sites More sharing options...
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