The main road that led south from the base where the Transcendent faction was located to the Baiquan Camp was in the past filled with destroyed vehicles, trees that had been uprooted by some mutant beast or simply collapsed after being hit by some large vehicle, etc.
The road was in such a deplorable condition that it was basically impossible to drive a vehicle, let alone a caravan of vehicles driving in that area; it was simply undoable unless a large number of human power was mobilized to slowly remove the trees and move the vehicles or other obstacles out of the way.
After about a week's time, the troops that had been led by Zhong De shortly before Bai Zemin left for the north of the district had finally succeeded in clearing the road.