Secondary Moor Road

The secondary moor road  is a location based on theory. As its name implies, the lane could possibly be another route leading into the moor's forestry region, coming in at another location. It is believed to be a lesser (let alone known) route allowing for quicker travel to a specific area in the forest.

Location
As is named, the route would be located somewhere along the second road going down the moor. The moor road (primary) is believed to be a longer, more lengthy route based on time and distance whereas the secondary moor road would be quicker to travel and end up in the forestry region, possibly beating the moor road by some time.

Nothing is known as to how far this supposed route could be, but from the fact that the Land Rover takes off down in that general direction, it could mean that it lies further along the second road.

Theory explanation

 * 1) The secondary moor road explains how Max would have been able to return home faster than Tom and Lucy before they reached the crossroad, which explains why (as he is the driver of the Land Rover) managed to go another route and still make it.
 * 2) It could be argued that this route was taken by Lucy after escaping the forest at the end of the film, mostly due to the fact that the road appears different but could be from the direction she is travelling in. This uncertainty, of course, cancels this reasoning out and should not be referred to.
 * 3) This route could even be the track located in the forest, as instructed to take in case of a forest fire.