24V is a little on the high side for output from a CS3 with input from a power supply (60065 = 16V DC rated)
(22 V would be expected for a 6021 with a transformer)
however it is nominal for operation with no load - What do you get with load on the track ?

What you do need to indicate is how you actual came to this reading.
Specifically is it from the the CS3 (GFP3/TFP3) information display, or a multi-meter/oscilloscope.

The voltage to the track is a square wave and as such a true RMS multimeter is needed to get a good reading. But as the positive and negative pulse (duration) may not add up evenly, a bias is not uncommon
You may find that if you reverse the probes a reading of 10V may be seen.


Further to your original symptom .. - What does "stalled out" mean