▁a ▁time ▁when ▁the ▁un ions ▁were ▁resist ing ▁the ▁loss ▁of ▁the ▁" second ▁man " ▁( the ▁fire man ▁in ▁steam ▁days ). ▁After ▁its ▁first ▁run ▁out ▁to ▁D uff ield ▁the ▁A PT - E ▁was ▁black ▁b anned ▁by ▁the ▁un ions ▁for ▁a ▁year . ▁ ▁Nevertheless , ▁its ▁empir ical ▁research ▁into ▁vehicle ▁dynamics ▁has ▁produced ▁today ' s ▁high ▁speed ▁trains , ▁both ▁fre ight ▁and ▁passenger , ▁including ▁the ▁Inter City ▁ 1 2 5 ▁and ▁Inter City ▁ 2 2 5 . ▁The ▁concept ▁of ▁a ▁til ting ▁system ▁for ▁the ▁A PT ▁became ▁part ▁of ▁the ▁P end ol ino , ▁while ▁the ▁products ▁of ▁its ▁sign alling ▁and ▁operations ▁control ▁research ▁are ▁used ▁over ▁a ▁significant ▁amount ▁of ▁the ▁British ▁railway ▁system . ▁ ▁References ▁ ▁Further ▁reading ▁ ▁Mars den ▁Col in , ▁J . ▁( 1 9 8 9 ) ▁ 2 5 ▁years ▁of ▁railway ▁research . ▁Oxford ▁Publishing ▁Co . ▁Oxford , ▁S B N ▁ 8 6 0 9 3 ▁ 4 4 1 ▁ 1 . ▁ 1 1 2 ▁P ages . ▁ ▁External ▁links ▁Dave ▁C ox on ' s ▁site ▁about ▁train ▁testing ▁at ▁the ▁Research ▁Division ▁in ▁the ▁ 1 9 7 0 s ▁and ▁ 8 0 s ▁A ▁selection ▁of ▁the ▁research ▁papers ▁published ▁by ▁the ▁division ▁Access ▁to ▁search able ▁abstract s ▁of ▁most ▁research ▁papers ▁published ▁by ▁the ▁division ▁( free ▁access , ▁but ▁registration ▁required )