Is X band used in Indiana? You bet it is. The Hancock Co. Sheriff has it. They are located just east of Indy and patrol I-70 along with the State Police. I have seen a few K-55 X band radars in the Indiana State Police in Hamilton County and in Marion County. The State Police are migrating toward Ka band with some K band units, but I would not turn off my X band just yet. There are also some counties up north using X band.
K band is the most common radar in Hamilton County. The local cops there seem to have stopped using X band for now. A lot of the small towns do have Ka band. The use of Ka band is increasing but K is still the most common.
Laser is used mostly by the State Police, and even then not so often. Noblesville Police have a laser. They don't use it that often, and when they do, they sit way off the road and use the VASCAR-like feature. They measure a distance between two landmarks, then sit far back off the road and time vehicles between the landmarks. I think it is the Kustom ProLaser II that has this feature.
I have seen no POP mode in Central Indiana at all.
What do you other Indiana members see as far as radar and laser speed traps?