ATP – Automatic Train Protection
CPL – Color Position Light
ECP – Electronically Controlled Pneumatic
DMU – Diesel Multiple Unit
OCS – Overhead Contact System
TBU – Tread Brake Unit
PAT – Personal Automated Transport
DMI – Driver Machine Interface
LRV – Light Rail Vehicle
ACD – Anti-Collision Device
TPF – Traction Power Facility
ECM – Engine Control Module
SOD – Safe Overrun Distance
ATO – Automatic Operation
DOO – Driver Only Operation
PTC – Positive Train Control
BMU – Bi-Mode Multiple Unit
STM – Specific Transmission Module
DP – Distributed Power
USFD – Ultrasonic Flaw Detector
ABS – Automatic Block Signaling
DSD – Driver’s Safety Device
RCL – Remote Control Locomotive
HVAC – Heating Ventilation and Air Conditioning
ITD – Individual Train Detection
APM – Automated people Mover
ETD – End of Train Device
TSL – Temporary Single Line
ART – Advanced Rapid Transit
ETH – Electric Train Heating
IRJ – Insulated Rail Joint
CTC – Centralized Traffic Control
RGM – Rail Grinding Machine
OPO – One Person Operation
ATC – Automatic Train Control
UI – Unit Injector
MEMU – Mainline Electric Multiple Unit
EMU – Electric Multiple Unit
RPO – Railway Post Office
FRED – Flashing Rear End Device
OMO – One Man Operation
DPWCS – Distributed Power Wireless Control System
TWC – Track Warrant Control
CWR – Continuous Welded Rail
RTC – Rail Traffic Control / Rail Traffic Controller
MCS – Medium Capacity System
TOFC – Trailer on Flatcar
ATWS – Automatic Track Warning System
DMS – Dead Man’s Switch
MU – Multiple Unit
