Parax

You could use the detection to trigger (via rule on your PC) an accessory module, the accessory module could drive your led indicators. Detection modules are effectively inputs to the computer and Accessory modules are effectively outputs from the computer. You can do what ever you want with them.. Input can be either train detection or switches and outputs can be changes of points or lights/signals or indicator led's on your mimic panel

300 meters of wire will give you a 1 Microsecond Delay. a short DCC pulse is 58 Microseconds and a long pulse is 100 microseconds So keep your Bus and Track lengths within 1km of each other and you'll be fine.

Yes this is correct, Right Rail with forward Diodes.. in order to use the forward only Braking mode. All the retail modules use forward diodes and must be installed in the correct direction on the right rail. But if your module has Reverse diodes it will need to be on the Left rail to get the same forward only braking mode to work. So Right Rail with forward diodes = Left Rail with reverse diodes. If you are not using Directional Braking modes and are just braking on any asymmetry then you can have any of the four combinations. Right Rail Forward Diodes Left Rail Reverse Diodes Right Rail Reverse Diodes Left Rail Forward Diodes

This is all true.. but ABC is a workable option when all the issues are addressed correctly.. I have fixed the many issues (metal wheels the long stopping distances and crucially push pull trains!) with my own home built modules.. I really wish that at least one manufacturer would make something that works properly like this.. I use on track detection in two sections, an approach and a stop block, but crucially if you want to stop at a red you've got to slow down at the amber first! (see the full speed push into red light test for unrealistic emergency stopping!) The stop section I have in the demo is 45cm and the train is set to stop from the slow approach speed to stop in 35cm, (works with about 50mm precision.) The Approach section does need to be long enough to hold the whole train. (So it is simply from the previous signal..) my modules are switched from the same DCC address that changes the lights.. (in the video below the left rail is continuous, the right rail is split into 2 sections per signal and there is a right rail bus wire along side)