nationwide public safety 'travel' channels

[Peteri Szerlagi]

https://forums.radioreference.com/threads/national-travel-channel.465677/

'I guess they are using 7DATA69D as Fire/EMS travel and 7DATA89D as
Law enforcement travel'

note - 'travel channels' are short range channels that public safety
units in a convoy can use to chat amongst themselves

note - the "D" in those channel names signifies 'direct' aka non repeaterized

note - these channels were listed in a channel plan for San Diego County CA