freeways, now the point where I-695 makes a sharp turn from west to south, just to the north of where it crosses the Fall River, was originally built with provisions for extending the Windlass Freeway to I-95, but this has since been reconfigured as a sharp curve on I-695. The Outer Harbor Crossing is the name given to the segment of the Baltimore Beltway maintained by the MDTA. It consists of the segment of I-695 between exit 40 (MD 151) and exit 2 (MD 10), which includes the Francis Scott Key Bridge. The route was originally planned as a two-lane freeway on a four-lane right-of-way, with a two-lane outer harbor tunnel across the Patapsco River. When the tunnel was advertised for construction in 1970, the bids were so high that the decision was made to construct a four-lane bridge instead. The bridge was to feature two-lane approach roads on both sides. Construction on the Outer Harbor Crossing, including the bridge, started in 1972 and was opened on March 23, 1977, completing the full Baltimore Beltway. The bridge was named the Francis Scott Key Bridge in honor of Francis Scott Key, who wrote "The Star-Spangled Banner", the national anthem of the US. By the early 1980s, the southern approach to the Francis Scott Key Bridge was dualized, with a second roadway constructed along with a second drawbridge over Curtis Creek. The northern approach was left as a two-lane viaduct in the Sparrows Point area until a four-lane surface freeway was constructed along this portion, with interchanges reconfigured, following an $89.5-million (equivalent to $ in ) project completed in January 2000. The Outer Harbor Crossing, as well as the entire Baltimore Beltway east of I-95, was first signposted as MD 695 because portions of it were a two-lane expressway not up to Interstate Highway standards. Improvements to the road have allowed the entire Baltimore Beltway to be signed as I-695, even though all of I-695 between the junction of I-95 northeast of Baltimore and I-97 is officially considered MD 695 by MDSHA. On June 8, 1999, a tractor-trailer carrying a backhoe that exceeded the maximum height requirement struck a pedestrian footbridge over the Baltimore Beltway just northwest of the I-95 junction near Arbutus. The footbridge collapsed onto the inner loop of the beltway. One driver was killed when his SUV struck the collapsed bridge; six others were injured, three critically. The incident