Question for TN residents or LEO's that may be on here please ...

Anybody know the truth regarding this? I'll be honest, I typically drive 75 MPH thru Knoxville on I-40 (artificially low posted at 55 on the interstate btw) and would really like some clarification so I don't really screw myself while visiting family out there in a ... Radar Roy's Detector and Jammer Buyer's Guide! For pros or novices, this FREE 22 page consumer report is a must read for anyone considering any speed counter measure device. Radar Detector Buyer's Guide ...