I'm not from Germany or anything, but my guess would be that it would be to help the utilities get to emergency problems as fast as possible. I say this because I often hear FDs requesting "a push on utilities". Even a couple times with major gas leaks or live wires on a fire scene, I have heard FD chiefs request a PD escort for the utility company. I was at a rollover a couple months ago and a wrecker came through with a Q to clear traffic though.