Our Indiana State Police used 42.420, 42.26, 42.12 42.160 for years until they went to 800Mhz APCO P-25 currently in use across our state and all the post.You might hear Calfornia Highway Patrol on 42.120 when low band opens up.I used to hear California all the time here in Indianapolis when the band was open to the west coast.Also understand that Tennessee Highway Patrol in Nashville,Tn is still low band.You also might listen to 42.420 and you should hear them.When low band opens up just put your scanner on search between 42.000 to 42.980 and you should hear of frequencies when they open up.Also check 39Mhz and you should hear activity from all over.Also you can check 33Mhz and 46Mhz for low band fire traffic from all over the US..Happy Scanning.Tim DeLong W9NES Indianapolis,Indiana