Is a K or Ka-band radar device on the IACP’s approved list important?
A1. Ka-band requirement combined with IACP listing requirement reduces choices to, perhaps, 1 manufacturer in the US. Every sign manufacturer in the U.S. but one uses one of two guns; Decatur Electronics SI-II or Kustom Signals’ DRU unit. Both of these are K-band units designed expressly for this type of application but both of no interest to the folks compiling the IACP list. Unless the client expects to write tickets and issue fines for offenses using these signs (not recommended either) this requirement is competition limiting, over-reaching and costly. These types of signs are described by both the NHTSA and the MUTCD as “advisory” signs and not “traffic control” devices negating any reason to over-engineer such a product.
