The ones I've rode look like these[0], so in case they are running in different directions, you can easily lift up the one side with just one wheel on both vehicles, and then just push them. Simple and not a heavy lift either.
Definitely an issue with personal rail travel, whether from the opposite direction or an unclearable traffic jam in the same direction, and whether two rails or mono.
If it’s like the ones I’ve been on, you either lift them off the rails, or if you’re just hiring them, sometimes just both turn yours the other way and swap.