321. On a two-way roadway with two lanes or over, the driver of a road vehicle must use the right-hand lane of the roadway.
To pass another vehicle, to turn left or where the right-hand lane is obstructed or closed to traffic, the driver may use another lane in the direction his vehicle is moving.
Where all the lanes in the direction in which the vehicle is moving are obstructed or closed to traffic, the driver may use the nearest lane in the opposite direction that is not obstructed or closed to traffic, but he must then yield the right of way to any vehicle moving in the opposite direction.