Stromlo Multiple Loop Course for 24Hr
The design is two 15-17 Km laps which join each other at a "pinch" in the middle where the transitions are. Think of it as shaped like an hourglass (the bulb ends of the hourglass are distorted to fit around the hill - but in concept its an hourglass).
So, you do the first lap (red), which brings you back to the pinch of the hourglass, the course then automatically changes to the second (green) lap at that transition point for the other half of the hourglass. At the end of the green lap you're back at the transition area where the course changes to the red lap. On and on like this for 24 hours.
There is no need to travel further to either transition point. They are both within 100m of each other. So we have two transitions, two timing points and two lap time displays running from a system which automatically checks that you (or your team) does laps in the order red/green/red/green etc. You will not be able to do two laps of the same colour in a row unless you leave the course (ie cheat, and the timing system is designed to catch that).
We'll probably start some categories on the red lap and the rest on the green. That way, congestion is minimised in the early laps.
Advantages? You only have to ride 15Km in one hit if thats all you can manage. Your batteries only have to last 15Km at night. But all the riders are spread out over 30Km so the congestion is minimised, and that 30Km means we can fit in all the great new tracks out there.