streetcar
Electrically powered vehicle for transporting people; it rolls on tracks embedded in city streets and on the edge of roadways.
catenary 
One or more overhead wires supplying electricity to the streetcar.
motor bogie 
Double-axle truck whose steel wheels are driven by an electric motor and roll along tracks.
route sign 
Screen that is usually placed on the front, rear and side of the streetcar to show its route number.
pantograph 
Articulating mechanism on the roof of the streetcar that collects electricity from an overhead catenary.
advertising sign 
Poster on a space rented by a business that promotes products or services.