To keep you from drifting from your lane, this system tracks marks on the road to make steering corrections if you leave the lane's center without a turn signal. (toyotasantamonica.com)
This image shows a close - up of track marks from the first test drive of NASA's Curiosity rover. (edutopia.org)
Gathering up feathers, scales, mucous, and analysing track marks all contribute to the Hunter's Guide entry on a specific monster. (co-optimus.com)