The RDS-TMC service transmits traffic information about THE MOST IMPORTANT INCIDENTS that entirely or substantially limit the road traffic. The priority is given to high traffic density roads, i.e. incidents on motorways, expressways, and higher class roads.
In order to achieve a reliable reception of traffic information by a navigation device, IT IS NECESSARY TO HAVE:
If these conditions are met, the device should receive and display current traffic information in a general view or for the selected route (the specific display differs according to the navigation device type).
You can ask questions concerning the RDS-TMC service broadcast within the Integrated Traffic Information System for the Czech Republic using the section "Write to us".