During the morning rush hour, it could be used by southbound traffic; at other times it could revert to a turning lane or be used by northbound traffic.

In 2012, the direction of traffic in the tunnel was temporarily reversed, so that it was in use by southbound traffic.

The original bridge was reconfigured to carry southbound traffic.

It consists of two separate tunnels, one for northbound traffic and another for southbound traffic.

When the second tube opened, the first tube was converted for northbound traffic only while the new tube carried southbound traffic.

I prefer to jump on the fastest southbound train.

The last northbound train leaving at 11:00 pm and the last southbound train leaving at 11:41 pm.

The last northbound train leaves at 7:15 pm and the last southbound train leaves at 8:26 pm.

The last northbound train leaves at 10:37 pm and the last southbound train leave at 12:30 am (early the next morning).

The four-car southbound train went into a curve and hit a guardrail.