My layout has two sets of hidden storage loops which are controlled and monitored from a mimic panel. The panel incorporates push-buttons to set the routes through the turnout fans at each end of the groups of loops. These are illuminated and light up to show the selected route. I have separate loops for the passenger lines and for the goods lines.
So that I know which train is in which loop, the system displays the 4-digit DCC address of the locomotive or multiple unit train occupying each of the loops. Click on the picture to pop up a larger, more legible version. The displays here showing “Occ” are temporary indicators whilst I get the system fully set up. The goods loops in the lower half are not yet working.
PTP-Lite is a relatively new layout control bus system introduced by MERG in 2015, which seemed the best option to link my mimic panel to the hidden storage loops. It conveys route setting instructions from the panel to the point motors on the layout and it returns the occupancy detection and turnout position feedback information to the panel. It is a self-contained system that allows for control and feedback on one pair of wires (layout control bus) and is very simple to set up.
There are RFID (Radio Frequency Identification) readers located under the approach tracks to each set of loops. 
These communicate via the PTP-Lite system to a central Translator module. This knows the DCC address corresponding to the tag ID received and displays it on the LCD screen in the middle of the panel along with the line on which the train has arrived, as shown here. It then passes that information on to the appropriate loop display module. When the train arrives in the loop, the address is displayed.
There is an illuminated push-button at each end of every loop which selects the route through the arrival and departure fans. The route selected is indicated by the lit button. Near the end of each loop is a red LED which comes on to show the train has arrived at the correct stopping point.
The loops will accept trains arriving in the normal direction of travel. Crossovers at each end allow trains to reverse. If the train is loco-hauled, it will draw forward to detach then use the crossovers to run round its train. A multiple unit train can, of course, depart directly by using the crossover at the other end.