{"id":1540,"date":"2024-07-09T09:09:57","date_gmt":"2024-07-09T09:09:57","guid":{"rendered":"https:\/\/iticfoundation.org\/?page_id=1540"},"modified":"2026-09-14T04:09:53","modified_gmt":"2026-09-14T04:09:53","slug":"location-table","status":"publish","type":"page","link":"https:\/\/iticfoundation.org\/en\/location-table\/","title":{"rendered":"Location Table"},"content":{"rendered":"\t\t
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Location Table<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Location Table dataset<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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This is an annual service providing the latest Location Table dataset\u2014a set of standardized reference tables used to pinpoint the locations of intersections and roads. The Intelligent Traffic Information Foundation (iTIC), in collaboration with ITS Thailand, NECTEC, and partner company, has continuously co-created and maintained the Thailand Location Tables, utilizing them as the primary location reference source for broadcasting traffic information.<\/p>

Please request the iTIC location table from this <\/span>section.<\/span><\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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FAQ: Location Table<\/h2>\n

Location-reference data for the road network \u2014 for members connecting traffic data with iTIC<\/p>\n <\/header>\n\n

\n\n
\n \n 01<\/span>\n What is a Location Table?<\/span>\n <\/span>\n <\/summary>\n
\n

A Location Table is a structured set of location-reference data for a road network. It identifies intersections, road segments, directions, and Location Codes, allowing traffic information from different systems to refer to the same physical location consistently.<\/p>\n

\n Example<\/span>\n

Instead of describing an incident as \"an accident near Intersection A,\" a system can transmit Location Code: 12345<\/code>, enabling receiving systems to display the incident at the corresponding map location.<\/p>\n <\/div>\n <\/div>\n <\/details>\n\n

\n \n 02<\/span>\n Why is a Location Table important for traffic information?<\/span>\n <\/span>\n <\/summary>\n
\n

A Location Table enables traffic events \u2014 accidents, congestion, roadworks, flooding, and lane closures \u2014 to be located accurately and interpreted consistently between iTIC and member systems.<\/p>\n

\n Example<\/span>\n

When iTIC sends a congestion event together with a Location Code, a member system can use the Location Table to match that code to its map and display the affected area to users.<\/p>\n <\/div>\n <\/div>\n <\/details>\n\n

\n \n 03<\/span>\n Who manages and updates the Location Table?<\/span>\n <\/span>\n <\/summary>\n
\n

iTIC manages and publishes the Location Table in collaboration with an external map-data provider, supporting updates that reflect changes in the road network. iTIC coordinates the process, reviews data completeness, prepares new versions, and notifies members when updated data is available. The names of the map-data provider and member organizations using the data are not disclosed in this public document.<\/p>\n <\/div>\n <\/details>\n\n

\n \n 04<\/span>\n Why does the Location Table need to be updated?<\/span>\n <\/span>\n <\/summary>\n
\n

Road networks change over time \u2014 new roads, connectors, elevated roads, junction improvements, and traffic-direction changes. Keeping the Location Table up to date helps ensure traffic information is accurately referenced and displayed.<\/p>\n

\n Example<\/span>\n

When a new road connector opens, relevant location points and road segments may need to be added so incidents on the new route can be transmitted and displayed correctly.<\/p>\n <\/div>\n <\/div>\n <\/details>\n\n

\n \n 05<\/span>\n What types of information may be updated?<\/span>\n <\/span>\n <\/summary>\n
\n

Location Table updates may include:<\/p>\n

    \n
  • Adding Location Codes for new roads, intersections, or routes<\/li>\n
  • Updating road names, reference points, or coordinates<\/li>\n
  • Revising traffic-direction information<\/li>\n
  • Updating connections between Location Points and road segments<\/li>\n
  • Retiring Location Codes that are no longer in use<\/li>\n
  • Improving data to support member and downstream-system use<\/li>\n <\/ul>\n <\/div>\n <\/details>\n\n
    \n \n 06<\/span>\n What is the relationship between iTIC and TISA?<\/span>\n <\/span>\n <\/summary>\n
    \n

    iTIC uses the Location Table as a location-reference source for producing and distributing traffic information in Thailand. TISA (Traveller Information Services Association) is an international organization that supports standards, validation, and certification services for TMC Location Tables, helping promote data quality and interoperability.<\/p>\n

      \n
    • iTIC:<\/strong> Uses and publishes the Location Table to reference traffic-event locations.<\/li>\n
    • TISA:<\/strong> Supports standards, validation processes, and certification for TMC Location Tables.<\/li>\n
    • Members:<\/strong> Use the Location Table to connect traffic information to their maps and services.<\/li>\n <\/ul>\n <\/div>\n <\/details>\n\n
      \n \n 07<\/span>\n What is TMC?<\/span>\n <\/span>\n <\/summary>\n
      \n

      TMC (Traffic Message Channel) is a method for coding and distributing traffic and travel information. It uses Location Codes from a Location Table to identify the location of an event, helping providers and downstream systems interpret event locations consistently.<\/p>\n

      \n Example<\/span>\n

      An event message may identify an accident and include the relevant Location Code. A member system uses the Location Table to associate that code with a map location and present the event to users.<\/p>\n <\/div>\n <\/div>\n <\/details>\n\n

      \n \n 08<\/span>\n What is the purpose of submitting or updating a Location Table through TISA processes?<\/span>\n <\/span>\n <\/summary>\n
      \n

      Submitting a Location Table for TISA validation or certification helps confirm that the table aligns with applicable TMC standards and best practices. TISA reviews new and updated Location Tables and operates a certification process for tables that pass the required tests.<\/p>\n

      Note:<\/strong> TISA does not receive iTIC's daily traffic-event feed. Its role relates to standards, validation, and certification of Location Tables used for TMC services.<\/p>\n <\/div>\n <\/details>\n\n

      \n \n 09<\/span>\n How does TIS 2604 relate to the Location Table and TISA TMC?<\/span>\n <\/span>\n <\/summary>\n
      \n

      TIS 2604 is the Thai Industrial Standard for Traffic Information Service and Exchange, developed by the Thai Industrial Standards Institute (TISI). It supports a consistent approach to providing, managing, and exchanging traffic information among organizations and systems.<\/p>\n

        \n
      • TIS 2604:<\/strong> Thailand's standard framework for traffic information service and exchange<\/li>\n
      • Location Table:<\/strong> Location-reference data for a road network, including intersections, road segments, directions, and Location Codes<\/li>\n
      • TMC:<\/strong> A method for coding and distributing traffic-event information using Location Codes<\/li>\n
      • TISA:<\/strong> An international organization supporting standards, validation, and certification for TMC Location Tables<\/li>\n <\/ul>\n

        Accordingly, TIS 2604 supports traffic information exchange in the Thai context, while the Location Table and TMC enable traffic events to be precisely located and shared between systems.<\/p>\n <\/div>\n <\/details>\n\n

        \n \n 10<\/span>\n What is the general Location Table update and publication process?<\/span>\n <\/span>\n <\/summary>\n
        \n
          \n
        1. The map-data provider updates data based on road-network changes.<\/li>\n
        2. iTIC reviews the completeness and appropriateness of the updated data.<\/li>\n
        3. A new Location Table version is prepared, with a record of changes.<\/li>\n
        4. Relevant validation or TMC Location Table certification processes are conducted, where applicable.<\/li>\n
        5. iTIC notifies members and makes the new version available.<\/li>\n
        6. Members update their systems with the latest version.<\/li>\n <\/ol>\n

          Traffic information services and exchanges are carried out in accordance with applicable standards and requirements, including TIS 2604 within the relevant operational scope.<\/p>\n <\/div>\n <\/details>\n\n

          \n \n 11<\/span>\n What should members do when a new Location Table version is released?<\/span>\n <\/span>\n <\/summary>\n
          \n

          Members should monitor update notifications from iTIC and implement the latest Location Table in accordance with applicable technical guidance, so their systems can correctly interpret Location Codes and continuously display traffic information.<\/p>\n

          \n Example<\/span>\n

          If Location Codes are added for a new elevated road, members that update their Location Table can display events on that route. Systems using an earlier version may not identify the location completely.<\/p>\n <\/div>\n <\/div>\n <\/details>\n\n

          \n \n 12<\/span>\n What are the impacts of using an outdated Location Table?<\/span>\n <\/span>\n <\/summary>\n
          \n

          Using an outdated Location Table may result in:<\/p>\n

            \n
          • Inability to support newly added roads, intersections, or routes<\/li>\n
          • Incorrect display of event locations<\/li>\n
          • Failure to interpret certain Location Codes<\/li>\n
          • Incomplete data reception or display<\/li>\n
          • Reduced quality of service for end users<\/li>\n <\/ul>\n <\/div>\n <\/details>\n\n
            \n \n 13<\/span>\n Does a Location Table update change the TMC message format?<\/span>\n <\/span>\n <\/summary>\n
            \n

            In general, a Location Table update changes location-reference data rather than the TMC message structure itself. However, members should review each release's change details \u2014 such as added, modified, or retired codes \u2014 to assess operational impact and plan system updates accordingly.<\/p>\n <\/div>\n <\/details>\n\n

            \n \n 14<\/span>\n Can members report location data that should be corrected?<\/span>\n <\/span>\n <\/summary>\n
            \n

            Yes. Members may report suspected inaccuracies or changes in the road network to iTIC for review and coordination with relevant parties. Information to include in a report:<\/p>\n

              \n
            • Road name, intersection, or reference point<\/li>\n
            • Description of the issue or requested correction<\/li>\n
            • Coordinates, map, or supporting images, if available<\/li>\n
            • Date the issue or change was observed<\/li>\n
            • Impact on the system or service<\/li>\n <\/ul>\n <\/div>\n <\/details>\n\n
              \n \n 15<\/span>\n What is an example of the end-to-end update process?<\/span>\n <\/span>\n <\/summary>\n
              \n
                \n
              1. A new road connector opens.<\/li>\n
              2. The map-data provider adds the relevant points and road segments to the Location Table.<\/li>\n
              3. iTIC reviews the update and prepares a new Location Table version.<\/li>\n
              4. Relevant validation or TMC Location Table certification processes are completed, where applicable.<\/li>\n
              5. iTIC notifies members about the update.<\/li>\n
              6. Members update their systems.<\/li>\n
              7. When iTIC sends an event with the related Location Code, member systems can match it to their maps and display it accurately.<\/li>\n <\/ol>\n <\/div>\n <\/details>\n\n <\/div>\n\n
                \n

                Key Terms<\/h3>\n
                \n

                iTIC<\/p>

                The organization that produces and distributes traffic information and manages the use of Location Tables to support data delivery to members.<\/p><\/div>\n

                TIS 2604<\/p>

                The Thai Industrial Standard for Traffic Information Service and Exchange, developed by the Thai Industrial Standards Institute (TISI).<\/p><\/div>\n

                TISA<\/p>

                Traveller Information Services Association \u2014 supports standards, validation, and certification services for TMC Location Tables.<\/p><\/div>\n

                TMC<\/p>

                Traffic Message Channel \u2014 a method for coding and distributing traffic information using Location Codes from a Location Table.<\/p><\/div>\n

                Location Table<\/p>

                A table of location-reference data for a road network, including intersections, road segments, directions, and Location Codes.<\/p><\/div>\n

                Thailand Location Table<\/p>

                A Location Table used to reference locations on the road network in Thailand.<\/p><\/div>\n

                Location Code<\/p>

                A unique code representing a location or road segment, enabling different systems to refer to the same location.<\/p><\/div>\n

                Location Point<\/p>

                A reference point on a road network, such as an intersection, U-turn point, toll gate, or the start\/end of a route.<\/p><\/div>\n

                Location Segment<\/p>

                A road section between Location Points, used to identify where an event occurs on a route.<\/p><\/div>\n

                Location Table Version<\/p>

                The version number identifying a specific Location Table dataset and its update status.<\/p><\/div>\n

                Traffic Event<\/p>

                An event affecting travel, such as an accident, congestion, roadworks, flooding, or lane closure.<\/p><\/div>\n

                Map Matching<\/p>

                The process of linking a Location Code to the corresponding real-world location on a downstream system's map.<\/p><\/div>\n

                Data Provider<\/p>

                An organization or system that provides traffic or event data to iTIC.<\/p><\/div>\n

                Data Consumer<\/p>

                A member or downstream system that receives data from iTIC for display, analysis, or end-user services.<\/p><\/div>\n <\/div>\n <\/div>\n\n <\/div>\n<\/section>\n\n