Context. The faint wear marks that tires make on the road over years, the seam between lanes, the car in front of them, the distance away from the guardrail or

Context. The faint wear marks that tires make on the road over years, the seam between lanes, the car in front of them, the distance away from the guardrail or ditch, or there are no marked lanes at all and you just have to share the road with oncoming traffic. Furthermore, it's not uncommon for three lane roads to turn into two lanes during heavy snow, and in those case, the lanes are wherever everyone decided they were, collectively.