Table 3 UCA between the dispatcher and... | Emerald Publishing

Table 3

UCA between the dispatcher and CTC system

Control action	UCA
Control action	Uncontrol	Control	Control at the wrong time	Stop too soon/Applying too long
Dispatcher modifies instructions	The dispatcher did not modify the instructions, causing hazards H-1 and H-2	The dispatcher modified the instruction, causing hazard H3	The dispatcher modified the instructions at the wrong time, causing hazards H1, H2, and H3	N/A
Dispatcher executes instructions	The dispatcher failed to execute the instructions, causing hazards H-1 and H-2	The dispatcher executed the instruction, causing hazard H3	The dispatcher executed the instructions at the wrong time, causing hazards H1, H2, and H3	N/A
Dispatcher handles the train route	The dispatcher failed to handle the approach, causing hazards H1 and H2	The dispatcher handled the train route, causing danger H3	The dispatcher handled the train route at the wrong time, causing hazards H1, H2, and H3	N/A
Dispatcher sends dispatch orders	The dispatcher did not send dispatching orders, causing dangers H1 and H2	The dispatcher sends a dispatch command, causing danger H3	The dispatcher sends dispatching commands at the wrong time, causing hazards H1, H2, and H3	N/A
Dispatcher issues train operation adjustment plans	The dispatcher did not issue the train operation adjustment plan, causing hazards H1 and H2	The dispatcher issues the train operation adjustment plan, causing hazard H3	The dispatcher issues the train operation adjustment plan at the wrong time, causing hazards H1, H2, and H3	N/A
Dispatcher sends train operation voucher	The dispatcher failed to send the train operation voucher, causing hazards H1 and H2	The dispatcher sends the train operation voucher, causing hazards H3	The dispatcher sends the train operation voucher at the wrong time, causing hazards H1, H2, and H3	N/A

Control action	UCA
Control action	Uncontrol	Control	Control at the wrong time	Stop too soon/Applying too long
Dispatcher modifies instructions	The dispatcher did not modify the instructions, causing hazards H-1 and H-2	The dispatcher modified the instruction, causing hazard H3	The dispatcher modified the instructions at the wrong time, causing hazards H1, H2, and H3	N/A
Dispatcher executes instructions	The dispatcher failed to execute the instructions, causing hazards H-1 and H-2	The dispatcher executed the instruction, causing hazard H3	The dispatcher executed the instructions at the wrong time, causing hazards H1, H2, and H3	N/A
Dispatcher handles the train route	The dispatcher failed to handle the approach, causing hazards H1 and H2	The dispatcher handled the train route, causing danger H3	The dispatcher handled the train route at the wrong time, causing hazards H1, H2, and H3	N/A
Dispatcher sends dispatch orders	The dispatcher did not send dispatching orders, causing dangers H1 and H2	The dispatcher sends a dispatch command, causing danger H3	The dispatcher sends dispatching commands at the wrong time, causing hazards H1, H2, and H3	N/A
Dispatcher issues train operation adjustment plans	The dispatcher did not issue the train operation adjustment plan, causing hazards H1 and H2	The dispatcher issues the train operation adjustment plan, causing hazard H3	The dispatcher issues the train operation adjustment plan at the wrong time, causing hazards H1, H2, and H3	N/A
Dispatcher sends train operation voucher	The dispatcher failed to send the train operation voucher, causing hazards H1 and H2	The dispatcher sends the train operation voucher, causing hazards H3	The dispatcher sends the train operation voucher at the wrong time, causing hazards H1, H2, and H3	N/A

Source(s): Authors’ own work