The trolley is an articulated frame 77 ft.
The girders weighing 2000 tons carry a double track for trains between the girders and on each side on cantilevers a trolley track, roadway and footway.
Since 1895 electric railways operated by the trolley system have steadily developed, their mileage in 1909 approximating 895 m.
A service of electric tramways is maintained, notable as being the first system installed in England with a combination of the trolley and conduit principles of supplying current.
It is divided into three main districts, Upper, Middle and Lower Barmen, and is connected, throughout its length, with Elberfeld, by railway, tramway, and a suspended trolley line, hanging over the bed of the Wupper.