As stated, DMV units are primarily on the Troop channels for their given AOR. In addition, at weigh stations, I’ve heard them on all conceivable variations of the license for (whatever callsign is) 460.500, to include 465.500 P25 in the clear (don’t recall the NAC offhand), 460.500 CSQ, 465.500 118.8, etc.
The VHF informal use has moved away from the 163/168 federal interops over the past year. Almost all of that traffic is on 155.4875 CSQ now.