GoA2 Explained - Semi Automated Train Operations
Rail automation is the ability to control train movements without a driver and GoA2 is the first level that accomplishes this by introducing the core rail automation functionality. A GoA2 vehicle controller has full control over the trains braking and propulsion and the decision of when to apply either one.
As a result, the jump from GoA1 to GoA2 is an order of magnitude higher than the jump to any other grade (for example from GoA2 to 3 or GoA3 to 4) due to the complexity and amount of automation required.
A GoA1 system (as oppose to GoA2) requires:
The driver is the critical link between the aspect displayed on a signal and the commands sent to the trains braking and propulsion; whereas in GoA2, these duties are eliminated and replaced by the vehicle and wayside controller.
The wayside controller determines how far the train is permitted to travel by transmitting movement authorization data to the vehicle controller. The vehicle controller determines when to apply braking or propulsion effort based on the movement authority.
This is the minimum of what is required for signalling automation but also the most complicated. Once a GoA2 design is established and proven, the jump to GoA3 and GoA4 is incremental because the signalling automation architecture is established.
To understand the jump from GoA1 to GoA2 and the GoA2 functionality, the following video dives into greater details.
Naeem Ali - CBTC Solutions
Retd. Chief Engineer / EL/ Railways
2 年After all, even automation has to be designed by man. Why not the same man/men run the trains. It will create more jobs and more user friendly and may be cheaper? India should not copy the West in all matters and use the human talented reservoir available.
DGM/Signalling at Delhi Metro Rail Corporation Ltd
2 年Jump from GoA3 to GoA4 is also a very difficult jump for a rail operator due to kind of automation required with iota of error unacceptable due to passenger safety.