Where used in this article, the following words shall have the following meanings:
(1) BRIDGE REPLACEMENT. Bridge replacement includes the replacement of existing bridge structures and, if necessary, the realignment of the adjacent approaches. If the route is to be four-laned, it includes the construction of a new bridge for the two new lanes.
(2) CONSTRUCTION, CONSTRUCT, or CONSTRUCTING. The act of completing a project. The physical building of the roadway, bridges, and appendages thereto.
(3) COUNTY ROADS. All paved or unpaved public roads, including bridges, within a county on the county road system and continuing into or through the corporate limits of any city or town in a county which are not a part of the state highway system.
(4) DEPARTMENT OF TRANSPORTATION. That state department created by Section 23-1-20.
(5) OBLIGATION LIMIT. That point in obligating or budgeting funds for projects that the Transportation Director may not exceed by approving any additional funding for projects.
(6) PROJECT. An undertaking to construct a particular portion of a highway.
(7) RESURFACING, RESTORATION, and REHABILITATION (RRR). Work undertaken primarily to preserve an existing facility. Restoration and rehabilitation is considered to be work required to return the existing pavement or bridge deck, including shoulders, to a condition of adequate structural support or to a condition adequate for placement of an additional state of construction (bridge deck protective system or resurfacing). Resurfacing consists of the placement of additional surface material over the existing, restored, or rehabilitated roadway or bridge deck to improve service-ability or to provide additional strength. RRR work may include changes to geometric features, such as widening, flattening curves, or improving sight distances.
(8) TRANSPORTATION DIRECTOR. The chief executive officer of the Department of Transportation authorized by Section 23-1-21.
(9) UNOBLIGATED FUNDS. That portion of an appropriation which has not been encumbered by a project budget or a project budget overrun.