The Nassau Electric Railroad was an electric street railway company in the U.S. state of New York. The company operated throughout the borough of Brooklyn, as well as over the Brooklyn Bridge and Williamsburg Bridge into Manhattan. Flynn then incorporated the Nassau Electric Railroad on March 13, 1893 in order to raise more capital for the system and with the right to use the tracks of the other three companies. In the next few years, most of the system's franchised lines, totalling about 100 miles (160 km), were built: