Presumably someone saw plenty of wombats at this GAP and once upon a time there was a sign at the bend in the track just below. Wombats are members of the family Vombatidae. Known for their solid flat skulls, they are just solid fullstop. To collide is to come off second best! The bones of the skull are extremely strong and unlikely to be damaged when the head is used as a battering ram to move comparatively large and heavy objects.
Wombats generally move slowly, weighing between 20 and 35 kg but when threatened can reach up to 40 km/h and maintain that speed for 150 metres. Like other marsupials, wombats give birth to tiny, undeveloped young that crawl into pouches on their mothers' bellies. The wombat's teeth are unique in that both the incisors and the molars are rootless and continue to grow throughout the animal's life.
More WOMBAT TRIVA In 2019 the production of cube-shaped wombat faeces was the subject of the IGNOBLE FOR PHYSICS, won by Patricia Yang and David Hu. Special bones in their backsides allow them to squeeze and form their faeces into cubes. The name "wombat" comes from the now nearly-extinct Darug language spoken by the aboriginal Darug people who originally inhabited the Sydney area. The spelling went through many variants over the years, including "wambat", "whombat", "womat", "wombach", and "womback", possibly reflecting dialectal differences in the Darug language. Fossil remains from some 25 million years ago had Joshua Sokol (2020) say "picture chocnk incarnate, a burrowing ball of fuzz and fat powered by muscular little stub-legs. Now multiply that five times. That’s the size of a new long-lost member of the same animal group, Mukupirna nambensis, a mega-wombat that tipped the scales at well over 300 pounds. Beyond the new Mukupirna, other extinct vombatiforms got even bigger, like Diprotoden a herbivore that weighed almost as much as a rhinoceros" For more info on Vombatidae see https://en.wikipedia.org/wiki/Wombat and https://www.fossilhunters.xyz/wombats/head-and-face.html