A patent-protected means of specifying roads that do not have TMC codes. AGORA-C specifies a method for dynamic encoding and decoding of location references into any map, without requiring predefined location codes or lookup tables. AGORA-C provides latitude and longitude data for roads, along with direction. Also known as DLR-1.
Dynamic Location Referencing. A patent-protected means of specifying roads that do not have TMC codes. Also known as AGORA-C.
Fuel Price Information. Information on where fuel is available and at what price.
Functional Road Class. Value that describes how major a road is, as shown in the following table.
1Highways and major intersections
2Major artery
3Major road
4 and higherNeighborhood streets
A scenario where a vehicle is going to a known destination. See also Unguided.
Level of Service (LOS)
A value that describes traffic flow on a TMC. The table below contains Level of Service values and their meanings. It also contains an example of the minimum and maximum percentages of the reference speed for that level, as well as the colors you could use when creating a traffic map. The minimum and maximum percentages are configured for each customer.
Level of ServiceConditionColorMinimum (% of reference speed)Maximum (% of reference speed)
1Free flowGreen71%100%
2Slow TrafficYellow51%70%
3Heavy TrafficYellow36%50%
4Queuing trafficOrangeN/AN/A
5Stationary trafficRed21%35%
6No traffic flowRed0%20%
A group of connected TMCs, often used in Location Referencing.
Location Referencing
A technique for returning the amount of data by only sending changes to the Level of Service (LOS) along a linear in order to minimize the amount of data transmitted.
Road segments that are not included in standard TMC tables, such as rural roads, new roads, and small road segments such as on-ramps.
Parking information.
A Quadtree used to specify a rectangular region of Earth. The map tile API requests use the Bing Maps Tile System quadkey.
Radio Data System (RDS)
Radio Data System (RDS) is a communications protocol standard for broadcasting traffic information.
Reference Speed
The expected speed on a TMC with no traffic. Often this is the speed limit.
Road segments that are within a TMC.
Traffic Event Compact, which refers to incidents that may affect traffic.
Traffic Flow and Prediction, which refers to the state of traffic at various locations, both in the present moment and predictions for the future.
The Traveller Information Services Association, which is responsible for the TPEG format.
Abbreviation for Traffic Message Channel. Often used to mean a TMC segment or TMC link, which is a defined segment of road.
A format for traffic-related data created by the Transport Protocol Experts Group.
TPEG data stored as XML.
A scenario where a vehicle is traveling, but no destination is known. See also Guided.
Weather information.
INRIX XD (eXtreme Definition) are segments that cover more miles of road than TMC segments, generally with greater granularity, and with the ability to adapt more quickly to changes in the road network and the addition of new roads and new markets.