__notoc__The Madison Avenue Bridge is a four lane swing bridge that crosses the Harlem River in New York City, connecting Madison Avenue in Manhattan with East 138th Street in the Bronx. It was designed by Alfred P. Boller and built in 1910 to replace and double the capacity of another earlier swing bridge dating from 1884. The bridge is operated and maintained by the New York City Department of Transportation.For 2011, the NYCDOT reported an average daily traffic volume in both directions of 41,423; having reached a peak of 49,487 in 2002.EventsThe bridge is part of the course for the annual New York City Marathon. The runners, after crossing over from Manhattan to The Bronx via the Willis Avenue Bridge, follow a short course through the borough and then return to Manhattan for the race's final leg via the Madison Avenue Bridge.Public transportationThe Madison Avenue Bridge carries the local bus route operated by MTA New York City Transit, the and express bus routes operated by the MTA Bus Company, and the express bus route operated by Westchester County's Bee Line Bus System. The average weekday ridership of the Bx33 bus route is 3,216. The average weekday ridership on the BxM3 bus route is 718. The average weekday ridership on the BxM4 bus route is 414. Prior to June 27, 2010, the BxM4 was known as the BxM4A and BxM4B.