Jtgshu wrote:Cab signals are far superior to fixed signals, as cab signals immediately send the trains information through the rails as to the track condition and occupancy ahead.I have read some material on moving block, and this coupled with real time speed code signaling (or automatic train control, driverless trains, etc) could prove to be the next install base of signaling. I agree this does in theory sound to be more powerful.
The cab signal system can give different speed allowances based on the track occupancy ahead, with much smaller blocks than fixed signals. As soon as a train ahead clears up a section of track, the cab signal immediately pops up to a better indication, or higher speed. Without cab signals, you would have to wait until the next fixed signal rolled around and was visible.