The north-south Golden State Freeway (I-5) in the Tehachapi Mountains of California between Los Angeles and the San Joaquin Valley. For several miles, the direction of traffic on both sides of the median is reversed—northbound traffic is on the western roadway and southbound traffic on the eastern roadway. In western Montreal, on the Autoroute 20, between the Route 138 and the Turcot Interchange, where the two directions, on opposite sides of a railway, are reversed (and one enters or exits via the left side).