In this chapter:

1. (1) "Cost" includes an expense of engineering and other expense incident to construction of an improvement.
2. (2) "Governing body" means the governing body of a municipality.
3. (3) "Highway" includes any part of a street, alley, public place, or square, including a part left wholly or partly unimproved in connection with another street improvement.

4. (4) "Improvement" includes the following, liberally construed:

   1. (A) filling, grading, raising, paving, or repairing a highway in a permanent manner;
   2. (B) constructing, realigning, or repairing a curb, gutter, or sidewalk;
   3. (C) widening, narrowing, or straightening a highway; and
   4. (D) an appurtenance or incidental to an improvement, including a drain or culvert.

Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.