Following up on my own post #276, I see now that there are two traffic suppliers in Mexico City:
TTN and Navteq.
The Garmin traffic page reports Navteq data which is also available in the Navteq page. That Navteq data seems to be more up to date than the TC data I get on my Nuvi 660.
I will post the FM table as is being shown in my Nuvi 660 later. Anyone can help me with the FID, PID, RgnID, VenID for Navteq?