The following words and terms, when used in this subchapter, shall have the following meanings, unless the context clearly indicates otherwise.

1. (1) Commission--The Texas Transportation Commission.
2. (2) District--One of the 25 geographical areas managed by a district engineer, in which the department conducts its primary work activities.
3. (3) Farm-to-Market (FM) or Ranch-to-Market (RM) road--A road shown in the records of the commission to be a farm-to-market or ranch-to market road.
4. (4) May--A permissive condition.
5. (5) Shall--A mandatory condition.
6. (6) Should--Advisable but not mandatory; however, any reason for not following the instruction shall be supported by sound engineering judgment.
7. (7) Texas Manual on Uniform Traffic Control Devices (TMUTCD)--The manual, and any revisions, adopted by the commission as required under Transportation Code, §544.001.
8. (8) Texas Turnpike Authority (TTA)--The Texas Turnpike Authority Division of the Texas Department of Transportation.
9. (9) Traffic Engineering Section (TE)--A section in the Traffic Operations Division whose primary responsibility relates to traffic engineering.
10. (10) Traffic Operations Division (TRF)--The division within the Texas Department of Transportation, headquartered in Austin, whose primary responsibility relates to traffic operations.

Source Note:The provisions of this §25.20 adopted to be effective February 17, 2000, 25 TexReg 1151.