John Roll
Meanwhile, in 1906, electric trolleys began to run on the Great Falls and Old Dominion Railroad (GF&amp;OD) northwest to Great Falls from Georgetown in Washington, D.C. The line, which John Roll McLean and Stephen Benton Elkins owned at the time, crossed the Potomac River on the old Aqueduct Bridge and passed through Rosslyn. The trolleys then traveled northwest on a double-tracked line through Arlington and Fairfax County to reach an amusement park (trolley park) that the railroad company constructed and operated near the falls.