Development was halted because of plans to replace trolleybuses by diesel buses, but the 1973 oil crisis led to a re-evaluation and work on the 14Tr resumed.

Its structure consists of mutually welded elements: the frame, side walls, roof and ends.

The body is covered with a steel skin; the section below the windows is thermally insulated and soundproofed.

[citation needed] From 1994 to 2004, Electric Transit, Inc. (a joint venture between Škoda and AAI Corporation) assembled 297 14Tr-based trolleybuses for the transit operators in two cities of the United States: Dayton, Ohio and San Francisco, designated 14TrE/E2 ("E" for "E"xport) and 14TrSF ("S"an "F"rancisco), respectively.

To meet "Buy America" requirements for federally-subsidized transit vehicle purchases, incomplete "shells" were manufactured at the Škoda plant in the Czech Republic and shipped to an American facility in Hunt Valley, Maryland for initial fitting-out.

A planned order for Gatchina, Russia was cancelled when construction of the trolleybus system stopped in 2005.