▁no ▁longer ▁used . ▁All ▁products ▁now ▁use ▁the ▁Al st om ▁brand . ▁ ▁In ▁ 2 0 0 3 , ▁the ▁S aw gr ass ▁facility ▁was ▁closed ▁and ▁all ▁activity ▁was ▁cons olid ated ▁at ▁the ▁John ▁Street ▁plant , ▁renamed ▁Al st om ▁Station . ▁ ▁Product s ▁ ▁Car bor ne ▁signal ing ▁equipment ▁Autom atic ▁Train ▁Control ▁( AT C ) ▁Autom atic ▁Train ▁Prote ction ▁( AT P ) ▁Autom atic ▁train ▁stop ▁( AT S ) ▁W ays ide ▁signal ing ▁equipment ▁DC ▁code ▁systems ▁electronic ▁communication ▁systems ▁electronic ▁inter lock ing ▁rel ays ▁signals ▁switch ▁machines ▁track ▁circ uits ▁trip ▁stops ▁yard ▁ret ard ers ▁Central ▁Control ▁signal ing ▁equipment ▁computer - based ▁Man ual ▁Control ▁Systems ▁computer - based ▁Tra ffic ▁Management ▁Systems ▁dark ▁territory ▁control ▁systems ▁electro - me chan ical ▁central ized ▁traffic ▁control ▁( c T c ) ▁machines ▁yard ▁control ▁systems ▁ ▁C li ents ▁Rail road ▁Am tra k ▁B NS F ▁Railway ▁Canadian ▁National ▁Railway ▁Canadian ▁Pacific ▁Railway ▁CS X ▁Fer rom ex ▁Gru po ▁Transport ación ▁Fer ro vi aria ▁Mex icana ▁Fer roc arr iles ▁Argent inos , ▁through ▁G RS ▁de ▁Argentina ▁( GR SA ) ▁E str ada ▁de ▁Fer ro ▁Central ▁do ▁Brasil , ▁( R io ▁de ▁Janeiro ) ▁( 1 9 3 3 - 1 9 5 7 ). ▁R FF SA , ▁( R io ▁de ▁Janeiro ) ▁( 1 9 5 7 - 1 9 8 4 ).