usually traffic lights and highway lights are owned by either County or the State while the ones on wooden poles and sometimes local roads metal poles are by the electric company...it depends on the electric company
in BGE, they pretty much service everything except for MD state highway lighting and SOME traffic lights streetlights (that are owned by the state) but if the lights and traffic light streetlight are owned by the county and is in BGE area, then BGE will service them....
However PEPCO, does not service ANYTHING except for streetlight wooden poles, and the County has to do the rest.....in Montgomery County...has 3 different electric companies......BGE, PEPCO and i think PECO (Allegenhy Power) and in BGE they service and installs metal poles themselves and sometimes if county installs them, BGE will own them and service them.....but in PEPCO area, the county (or some 3rd party company) will install the poles and the county is responsible.......and the poles are different from BGE area but same county...
PEPCO does not do really good job servicing lights to be honest, BGE does VERY GOOD JOB....the Montgomery County actually does good job......very good.....MD states seems to be OK, but there's some issues like
THIS!!!!