General

Pole Type - You can set which pole type will be used from the "Data Table Traffic Poles"

Mast Arm - Only certain types of poles can support a mast, to which a traffic light can be attached.

A traffic pole blueprint can have multiple "Traffic Lights" and "Pedestrian Traffic Lights". For each traffic light, you can set Type, Rotation, and Offset:

Multiple traffic lights on a pole

One of the traffic lights can be "Attached to Mast":

Traffic Signs - The blueprint also includes the ability to add a variety of traffic signs to the traffic poles. These signs can be easily attached to the poles and customized to fit your scene. You can set the type, offset, and rotation for each of them:

Props - For each of the props, you can set the type and transform offset (Location, Rotation, Scale)