Track signage for the theoretical physicist?

There must be some sort of Einsteinian Relativity going on here.
At Davon's Flat:

At 8 Mile Gap:

For the record, my GPS reckons it's 11km from Davon's to the highest of the Eagle Peaks, and another 3.4km from there to 8 Mile Gap. And both the GPS and the Hilux's odometer say 20km for the run between them on Brock's Road.
At Davon's Flat:

At 8 Mile Gap:

For the record, my GPS reckons it's 11km from Davon's to the highest of the Eagle Peaks, and another 3.4km from there to 8 Mile Gap. And both the GPS and the Hilux's odometer say 20km for the run between them on Brock's Road.