FILUM VIAE. The thread or middle of the road.

2. Where a law requires travellers meeting each other on, a road to drive their carriages to the right of the middle of the road, the parties are bound to keep ou their side of the worked part of the road, although the whole of the smooth or most travelled path may be upon one side of the filum viae. 7 Wend. 185; 5 Conn. 305.