In case you haven't seen it previously, an 'owners manual' for the Touring navigation system is available -
http://techinfo.honda.com/rjanisis/pubs/OM/AH/ATXM1919NM/enu/ATXM1919NM.PDF
The traffic info is GPS/satellite based, so I don't think there's a way to completely disable (assuming this is what you mean by 'turn off completely'?). It's present on the EX (and I'm guessing the LX too?), though not enabled. CivicX forum members have hacked EX trims to get Touring-trim navigation capabilities on their cars.
Per the Owners Manual (p343), GPS/satellite information is used by "Honda and Providers" to provide traffic information. The Navigation Manual (p101) also mentions the info relies on clear signal and information from local traffic providers, which varies by region. -
https://www.gen3insight.com/forum/2...ace/62-hondalink-navigation-live-traffic.html