AGORA-C

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.

DLR-1

Dynamic Location Referencing. A patent-protected means of specifying roads that do not have TMC codes. Also known as AGORA-C.

FPI

Fuel Price Information. Information on where fuel is available and at what price.

FRC

Functional Road Class. Value that describes how major a road is, as shown in the following table.

FRC	Meaning
1	Highways and major intersections
2	Major artery
3	Major road
4 and higher	Neighborhood streets

Guided

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 Service	Condition	Color	Minimum (% of reference speed)	Maximum (% of reference speed)
0	Unknown	Gray
1	Free flow	Green	71%	100%
2	Slow Traffic	Yellow	51%	70%
3	Heavy Traffic	Yellow	36%	50%
4	Queuing traffic	Orange	N/A	N/A
5	Stationary traffic	Red	21%	35%
6	No traffic flow	Red	0%	20%

Linear

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.

Off-TMC

Road segments that are not included in standard TMC tables, such as rural roads, new roads, and small road segments such as on-ramps.

PKI

Parking information.

Quadkey

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.

Sub-TMC

Road segments that are within a TMC.

TEC

Traffic Event Compact, which refers to incidents that may affect traffic.

TFP

Traffic Flow and Prediction, which refers to the state of traffic at various locations, both in the present moment and predictions for the future.

TISA

The Traveller Information Services Association, which is responsible for the TPEG format.

TMC

Abbreviation for Traffic Message Channel. Often used to mean a TMC segment or TMC link, which is a defined segment of road.

TPEG

A format for traffic-related data created by the Transport Protocol Experts Group.

TPEGML

TPEG data stored as XML.

Unguided

A scenario where a vehicle is traveling, but no destination is known. See also Guided.

WEA

Weather information.

XDS

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.