Each month we'll answer questions pertaining to a specific topic from our extensive NN4D FAQ catalog. View more questions and answers on the NN4D FAQ page. This month's topic is Traffic:

 This month's questions are:

1. Question: How do I get the specifications for the Traffic (and Event) API's?
   Answer: You can get the specification for the Traffic (and Event) API's from one of the NAVTEQ Account Executives in your region.
    
2. Question:  Is there statistical data available on how many messages typically/maximum are generated in current real life traffic situations?
   Answer:  The maximum number of Traffic Message Channel (TMC) messages that can theoretically be sent out is approximately fifty per minute. A terminal is expected to “store” a minimum of 300 messages. These messages include a variety of short-term events (i.e., accidents) that may need to be stored for a short period (30 minutes), to longer lasting roadwork events (current Chicago situation—work on the Dan Ryan Expressway).
    
3. Question:  What is the difference between Real-Time Traffic and Traffic Patterns™?
   Answer:  NAVTEQ Traffic provides continuously streamed information about traffic conditions, while NAVTEQ Traffic Patterns is a historical database with information about the average traffic flow velocity for specific sections of roadways, geo-referenced to the NAVTEQ map.
    
4. Question:  Are there data samples available for Real-Time Traffic or Traffic Patterns™?
   Answer:  Yes. You can find Traffic feed data samples as well as Traffic Patterns data samples in the Download Center on the NN4D NAVTEQ Traffic site.
    
5. Question:  I'd like to know where throughout the world Real-Time Traffic and Traffic Patterns coverage is available. Is that possible?
   Answer:  Yes. You can find coverage information on the NAVTEQ Traffic Coverage page on the NN4D.