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Section 2: Key Points to Know

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Responsibilities and Definitions for TRM

Construction Division (CST)—A Division of Texas Department of Transportation which oversees the highway construction and improvement program; provides service and expertise in materials quality and technology; and supports pavement management and pavement research projects. This Division is responsible for inputting highway load limit data into TRM (for more CST information click on this Internet address: http://www.txdot.gov/about_us/administration/divisions/cst.htm).

Districts—The 25 TxDOT “local” offices (for more information click on this Internet address: http://www.dot.state.tx.us/local_information/default.htm):

Anchor: #i1002238District-Id Values

Value

District

Value

District

01

Paris (PAR)

13

Yoakum (YKM)

02

Fort Worth (FTW)

14

Austin (AUS)

03

Wichita Falls (WFS)

15

San Antonio (SAT)

04

Amarillo (AMA)

16

Corpus Christi (CRP)

05

Lubbock (LBB)

17

Bryan (BRY)

06

Odessa (ODA)

18

Dallas (DAL)

07

San Angelo (SJT)

19

Atlanta (ATL)

08

Abilene (ABI)

20

Beaumont (BMT)

09

Waco (WAC)

21

Pharr (PHR)

10

Tyler (TYL)

22

Laredo (LAR)

11

Lufkin (LFK)

23

Brownwood (BWD)

12

Houston (HOU)

24

El Paso (ELP)

25

Childress (CHD)


Office of Primary Responsibility (OPR)—The district or division office responsible for making decisions on behalf of the department with regard to use, classification, and protection of specific information contained on a resource. This manual explains, in each chapter, the responsibilities for making decisions regarding the use, classification, and protection of specific highway information contained on the TRM resource.

Office of Secondary Responsibility (OSR)—The district or division office with secondary responsibility for making decisions on behalf of the department with regard to use, classification, and protection of specific information contained on a resource. This manual explains, in each chapter, the secondary responsibilities for making decisions regarding the use, classification, and protection of specific highway information contained on the TRM resource.

Texas Transportation Commission—The five-member Texas Transportation Commission governs the Texas Department of Transportation, which is headed by an executive director selected by the commission (for more commission information click on this Internet address: http://www.dot.state.tx.us/transcom/default.htm). The commission is responsible for approving all highway changes.

Transportation Planning and Programming Division (TPP)—A Division of TxDOT which administers planning funds and collects data on the state highway system (for more TPP information click on this Internet address: http://www.txdot.gov/about_us/administration/divisions/tpp.htm). TRM is one of the data collecting systems.

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Official TRM Location Key

Access all data within TRM by Signed Highway, Reference Marker Group, and Roadbed‑ID:

Signed Highway—Consists of the Signed Highway System + Signed Highway Number + Signed Highway Suffix. TRM ties all roadway information and reference markers to this route in:

  • System—Represents the posted designation approved by the Texas Transportation Commission for a segment of highway.

  • NOTE: Roadway link is the only exception. If a linking situation occurs, the system stores all data and reference markers with the Linking Signed Highway System within the linked segment.

  • Values are listed in order of hierarchy:

  • Anchor: #i1002312Signed Highway System Values

    Value

    Signed Highway System

    IH

    Interstate Highway

    US

    US Highway

    UA

    US Alternate Highway

    UP

    US Highway Spur

    SH

    State Highway (Includes NASA and OSR)

    SA

    State Alternate Highway

    SL

    * State Highway Loop (Includes Beltway)

    SS

    * State Highway Spur

    BI

    *Business Interstate Highway

    BU

    *Business US Highway (Includes US Alternate)

    BS

    *Business State Highway (Includes SH Alternate)

    BF

    *Business Farm or Ranch to Market Road

    FM

    * Farm to Market Road

    RM

    * Ranch to Market Road

    RR

    * Ranch Road

    PR

    Park Road

    RE

    Recreation Road

    RP

    Recreation Road Spur

    FS

    * Farm to Market Road Spur

    RS

    * Ranch to Market Road Spur

    RU

    * Ranch Road Spur

    PA

    Principal Arterial Street System ( PASS)

    Interstate Highway Business Route and US Highway Business Route are state designations and therefore do not conform to AASHTO guidelines.

    Routes marked with an (*) have equal value for signing, concurrent routing, data collection, and reference marker posting.



  • Number—Identification number associated with the Signed Highway System. Valid values are subject to these constraints:
    Anchor: #i1002391Highway Constraints

    If Highway System...

    Then...

    Reference Marker Number may be:

    = IH

    0000 to 9998

    Does not = IH

    0010 to 9998

    Highway Number may be:

    = SH

    0001 to 9999, NASA, or OSR

    Does not = SH

    0001 to 9999

    Highway Suffix may be:

    = PR

    Blank, A to Z

    = BI, BU, BS, BF

    A to H, J to N, P to Z

    Does not = PR, BI, BU, BS, BF

    Blank, N, S, E, or W


  • Suffix—Character added to the end of the Signed Highway Number to further partition the number or, in the case of business routes, to indicate geographical routing. Valid values are determined by the Signed Highway System as shown in the Highway Constraints table.

Reference Marker Group—Consists of the Reference Marker Number + Reference Marker Suffix + Signed Reference Marker Displacement:

  • Number—Official number posted on the signed highway route. Used together with the other components of the Reference Marker Group to locate roadway data in TRM. Determine valid values by the function. TRM numbers markers from state line to state line and from westernmost or northernmost point of the Highway origin. (South to north for interstate highway numbering.) Valid values, as shown in the Highway Constraints table, are: 0000 to 9999 (for interstate highways); 0010 to 9998 (for non-interstate highways)
  • Suffix—Posted suffix character, if any, appended to the reference marker number on the signed highway route. Used together with the other components of the Reference Marker Group to locate data on the highway in TRM. Valid values, as shown in the Highway Constraints table, are: Blank (no suffix) or A thru Z.
  • Sign—Symbol indicating the ascending or descending direction to a data feature or attribute from a posted reference marker. Valid values are: + (displacement in ascending reference marker direction) or – (displacement in descending reference marker direction).
  • Displacement—Distance in miles from a posted reference marker on the signed highway route to a data feature or attribute. Used together with the other components of the Reference Marker Group to locate data on the highway in TRM. Valid values are: 00.000 to 99.999

Roadbed-Id—Data stored and processed per roadbed requires the Roadbed-ID as part of the location key. Data relating to the entire roadway does not use Roadbed-ID as part of its location key.

We use these terms throughout the TRM User's Manual.
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