Based on that I'm assuming it's following other vehicles rather than following the road, which does make me wonder what happens when you get a clump of DRIVE PILOT vehicles which are all trying to follow each other.
Edit: It seems like it needs a vehicle ahead and under 60kph and uses a mix of other vehicles and road markings. It seems quite usable (but I still have to wonder how many vehicles you can get to follow each other in a chain): https://www.youtube.com/watch?v=0yiPaKfKLZs
Based on that I'm assuming it's following other vehicles rather than following the road, which does make me wonder what happens when you get a clump of DRIVE PILOT vehicles which are all trying to follow each other.
Edit: It seems like it needs a vehicle ahead and under 60kph and uses a mix of other vehicles and road markings. It seems quite usable (but I still have to wonder how many vehicles you can get to follow each other in a chain): https://www.youtube.com/watch?v=0yiPaKfKLZs