Type of signal lamp installation is as follows:

1) cantilever
That is, the signal lamp is installed on the long arm light pole. According to the connection between horizontal cantilever and vertical bar, the long boom can be divided into flange plate connection mode, cantilever hoop combined with the upper pull rod connection mode and vertical bar direct bending connection-free mode.
(2) column
Namely the straight rod way, like the pedestrian light pole, the integration signal light pole and so on.
(3) gantry
Namely the door frame type structure way.
(4) attached type
That is, while installing the signal lamp on the cantilever transverse arm, the pedestrian lamp, non-motor vehicle and other lamps and lanterns are installed on the vertical pole at the same time.
(5) central installation
For example, one cantilever up to the center of the intersection is installed to control multiple directional signals or the signal lamp is installed in the junction center guard booth.