trig42: You say it is roadside - so is it actually on your property (would be very unusual to have a streetlight on your property).
Generally, the poles will not be on your property - they will be on the council berm. Not your problem. You may have to mow the berm, but you don't have to trim the trees on that berm.
About this time last year I got home from work and noticed sparks from the powerline hitting the trees outside my place. I called Vector and someone was there within about 15 minutes to check it out (they must have done something, because the sparking stopped). The tree was trimmed back the following day. The pole is on the edge of our property, but according to the plans, is actually on the berm/road reserve.
Tree is rooted 100% on our property unfortunately, pole for power/light etc is about 2 ft from it....
Thats my house behind the tree.... you cant even see the street light in it. And in there is power and phone lines as well.