Maybe they need a road to pull their domiciles out of harms way. And to sustain a claim on the lands of their ancestors. Hard to do that these days if everyone thought to retreat to southern suburbia and leave their cultural history behind.

Hard to drive a four-wheeler now the wet season is upon their region more than ever before. Even dogs won't pull a sled and swim well, at the same time. The need for a road is probably more valid than a duplicate freeway beside an existing one, elsewhere. ;)