Any road or path affording passage especially a rough one(noun)
WordNet. Princeton University. 2010.
Use "cart track" in a sentence
"So as soon as he could, Inman forsook the dangerous roads of the valley country and took to a narrow cart track that aimed northward and climbed a ridge and fell into a deep river gorge and then rose hard toward the crest of the Blue Ridge."
"We walk out along a cart track raised above deep rhynes: the drainage ditches connecting with the larger dykes."