WX9RLT
Ham, Scanners, GMRS
My guess is that the police channels were less crowded than the existing fire channels, or that the police VHF infrastructure had better coverage.
I think your right. It may have better range and coverage for their radios.
I used to pickup the fire engines mobiles, they were scratchy. Now, when I hear them on the new freq. I can hear them as if they are next door. It did make one heck of a difference on my scanner when they switched over.