(at Ohio Street), a distance of about . These reversible lanes, situated between the inbound lanes and the Blue Line tracks, allow two lanes of traffic to flow towards or away from the city, depending on the time of the day. The lanes are controlled by computers and verified by humans at a separate control center. Steel mesh barriers and breakaway gates prevent traffic from entering oncoming lanes. On January 25, 2014, a drunk driver broke through the safety gates and drove in the express lanes in the wrong direction, but was stopped by a snow plow; no injuries were reported. This was the first wrong-way accident involving the express lanes. A third distinct feature is Hubbard's Cave, also called the Hubbard Street Tunnel, which passes under several streets and the Metra's Union Pacific West, North Central Service, Milwaukee District North, and Milwaukee District West lines (former Chicago & Northwestern and Milwaukee Road commuter lines respectively). It is named for Hubbard Street, one of the streets it passes underneath. Hubbard's Cave is a landmark frequently heard in traffic reports on radio and TV. The final distinct features are the nine exits in between mile markers 50 and 51, and the southbound exit to I-290 and Ida B. Wells Drive is marked as exits 51H and 51I. While the density of interchanges is quite dangerous, the hazard is partially offset by the fact that exits are apart on the right hand side, while entrances to the highway were apart, but on the left side. Known as the "suicide ramps", the entrance ramps on the left had little to no acceleration zone, and traffic on the ramps could not see mainline traffic until the last of the ramp. The 2009–10 reconstruction between Hubbard Street and the Circle Interchange improved safety by increasing the lengths of most entrance ramps and reduced bottlenecks by better utilizing the existing space. The Kennedy Expressway was the location of a large Magikist lips flashing sign which was a Chicago pop culture icon for many years. Located at the southeast corner where Montrose Avenue abutted the expressway, the sign was torn down in 2004. Exit list See also List of memorials to John F. Kennedy References External links John F. Kennedy Expressway (I-90 and I-94) at Steve Anderson's ChicagoRoads.com Historic, Current & Average Travel Times For The Kennedy Expressway Interstate 90 Interstate 94 1960 establishments in Illinois Expressways