As of 2015, what was the world's busiest motor vehicle bridge?

The George Washington Bridge – known informally as the GW Bridge, the GWB, the GW, or the George – is a double-decked suspension bridge spanning the Hudson River between the Washington Heights neighborhood in the borough of Manhattan in New York City and Fort Lee, New Jersey. As of 2015, the George Washington Bridge carries over 106 million vehicles per year, making it the world's busiest motor vehicle bridge. The bridge is owned by the Port Authority of New York and New Jersey, a bi-state government agency that operates several area bridges, tunnels and airports, marine seaports, and the PATH rapid transit system.

The bridge, an integral conduit within the New York metropolitan area, has an upper level that carries four lanes in each direction and a lower level with three lanes in each direction, for a total of 14 lanes of travel. The speed limit on the bridge is 45 mph (72 km/h), though congestion often slows traffic, especially during the morning and evening rush hours. The bridge's upper level also carries pedestrian and bicycle traffic. Interstate 95 (I-95) and U.S. Route 1/9 (US 1/9) cross the river via the bridge. US 46, which lies entirely within New Jersey, terminates halfway across the bridge at the state border with New York. At its eastern terminus in New York City, the bridge connects with the Trans-Manhattan Expressway (part of I-95, connecting to the Cross Bronx Expressway).