The eastern half, towards the Memorial Bridge, was missing a ramp to enter the Shirley Highway northeastbound.

Finally, a two-lane reversible HOV roadway was added in the median, becoming a four-lane two-way road from the eastern part of the interchange into Washington.

Special ramps to Route 27 towards the Memorial Bridge and to the Pentagon south parking lot (via Eads Street) were provided for HOV traffic.

That section included an interchange with Boundary Channel Drive, which served the Pentagon's north parking lot, and a bridge over the Rosslyn Connecting Railroad.

Past that was another full interchange, for Pentagon service access, just before a crossing (with no ramps) of the Jefferson Davis Highway Extension and the Rosslyn Connecting Railroad.

Finally, an interchange with Boundary Channel Drive (for north parking) was provided, with access only to/from the north, before the road crossed the Boundary Channel into Washington, D.C. (on Columbia Island) for connections to the Mount Vernon Memorial Highway (now the G.W.

Following the September 11 attacks, Route 110 was closed to trucks and tour buses due to its proximity to the Pentagon.

In September 2002, a contract was awarded to reroute Route 110 to increase the standoff distance between vehicles and the Pentagon.

Prior to the building of the Mixing Bowl, the Columbia Pike (and Route 244) ran through its site to end at the Jefferson Davis Highway (US 1).