(1) "Approach" means that section of the highway right-of-way between the outside edge of shoulder and the right-of-way line which is designed as a highway for the movement of vehicles between the highway and the abutting property.

(2) "Approach flare or radii" means the angle or curve radius connecting the approach to the outside edge of the highway shoulder.

(3) "Approach transition" means the area from the edge of an urban approach sloped to match the curb and border area elevations.

(4) "Approach angle" means the angle between the highway centerline and the extended approach centerline measured in a clockwise direction from the highway centerline.

(5) "Approach width" means the width of the approach excluding flares or transitions measured at right angles to approach centerline.

(6) "Border area" means the area between the outside edge of shoulder or curbline and the right-of-way line.

(7) "Corner clearance" (At an intersecting street or highway) means the distance, measured along the outside edge of shoulder or curb line, between the end of intersecting curb radius, edge of pavement of the intersecting highway, or frontage boundary line and the extension of the nearest approach edge, including flares or radii.

(8) "Department" means the Montana Department of Highways.

(9) "Distance between approaches" means the distance measured along the curb line or outside edge of shoulder between the extensions of the near edges of adjacent approaches, excluding flares.

(10) "Flare tangent distance" or "transition tangent distance" means the distance measured along the curb line or outside edge of shoulder, from the extension of the approach edge to the end of the approach flare or transition.

(11) "Frontage" means the distance a separate property is contiguous to highway right-of-way measured along the curb line or outside edge of shoulder, between frontage boundary lines of the property.

(12) "Frontage boundary line" means a line perpendicular to the highway centerline that passes through the point of intersection of the property line and the highway right-of-way line.

(13) "Joint use approach" means an approach shared by two adjacent property owners for service and connection to both their properties.

(14) "Plot plan" means a sketch to show the District Engineer the approximate location of the approach. It can show the distance from the nearest milepost or station marker. In the case of an approach in an urban area, city streets would be good ties. It should be on 8 1/2" x 13" paper and show the highway right-of-way.

(15) "Private approach" means an entrance to and/or from a commercial, industrial or residential property.

(16) "Property line clearance" means the distance measured along the curb line or outside edge of shoulder between the frontage boundary line and the extension of the nearest edge of the approach, including flares or radii.

(17) "Public approach" means an entrance to and/or from a highway, street, road, alley or other public right-of-way.

(18) "Safety zone" means the area between the outside edge of shoulder or curb line and the right-of-way.

(19) "Setback distance" means the horizontal distance measured at right angles to the highway centerline between the right-of-way line and permanent fixtures such as gas pump islands, signs, display stands, buildings, etc. The setback distance should be adequate to provide designated parking on private property.

(20) "Sight distance" means the length of highway ahead visible to the driver. The minimum sight distance available on a highway should be sufficiently long to enable a vehicle traveling at or near the likely top speed to stop before reaching an object in its path.

(21) "State" means State of Montana Department of Highways.

(22) The words "shall," "should" and "may" are used to describe specific conditions and in order to clarify their meanings, the following definitions apply:

(a) "Shall" means a mandatory condition.

(b) "Should" means an advisory condition.

(c) "May" means a permissive condition.