The driving companion: a route that knows what you are driving, the real speed limit ahead, live traffic where a free feed exists, the weather at the time you will be there — and guidance that keeps working with no signal.
Routes come from Valhalla on OpenStreetMap data, which understands vehicle height, width, weight and weight limits. If it is unreachable, a standard car route is used and labelled as such — never a made-up one.