IMO

--------------------------------------------------
Note added at 6 hrs (2015-11-19 01:45:35 GMT)
--------------------------------------------------

A traction network or traction power network is an electricity grid for the supply of electrified rail networks. The installation of a separate traction network generally is only done if the railway in question uses alternating current (AC) with a frequency lower than that of the national grid, such as in Germany, Austria and Switzerland.
https://en.wikipedia.org/wiki/Traction_power_network

--------------------------------------------------
Note added at 6 hrs (2015-11-19 01:53:12 GMT)
--------------------------------------------------

The project aims to enhance the power supply system of the trolleybus traction network.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&c...
ccccccccccccccccc

batteries, which enable trolleybuses to drive without the traction network.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&c...
ccccccccccccccc
G. U. Borde of New Orleans, who had designed Memphis's traction network,

cccccccccc

The first streetcars were pulled by horses and in 1893 they started running on an electric traction network.
https://books.google.com/books?id=myZuCAAAQBAJ&pg=PT71&lpg=P...
cccccccccccccccccccccccc

With the proposed streetcar network, you will have the traction circuit for both streetcar & trolleybus.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&c...