Terms used in this chapter mean:

(1) “National system of interstate highways,” includes all highways that have been or may become eligible for development with funds provided by federal highway acts for use on the interstate system;

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(2) “Control areas,” a control area is a metropolitan area, first or second class municipality, or industrial center, defense installation, a topographic feature such as a mountain pass, a favorable river crossing, a hub road which would result in material traffic increment on the interstate route, a section of completed expressway, or a place on the common boundary of two states agreed to by the states concerned;

(3) “Intermediate control points,” an intermediate control point is either end of an acceptable section on final location of an interstate route;

(4) “Department,” the Department of Transportation.

Source: SL 1955, ch 104, § 2; SDC Supp 1960, § 28.0232; SL 2010, ch 145, § 48.