Improvised Traffic Pole Base

This is a picture of a traffic light at the exit of the BU Bridge intersecting with Beacon St. in Boston. The traffic light pole is standing on a 55 gallon drum filled with cement. Next to it are the wires and remains of where the pole originally stood before it was struck by a vehicle and ripped from the floor. What I don't understand is the reasoning for it. Seriously, the time and resources spent on this temporary arrangement couldn't have been used to permanently attached it to the floor? Constructions in that area have a history of taking much longer than they should. Last year the work on the sidewalks finally completed after more than 2 years of work. The BU Bridge has been under repair for a few months and everyone that drives over it knows how much traffic it causes. I'm giving it at least another 2 years before the work's completed.