1. Arterial: a high or moderate capacity road below a highway that carries large volumes of traffic between urban areas.
2. Egress: a way out or exit, an exit ramp on an interstate
3. Feeder: a smaller road that flows into a larger road
4. Ingress: entering, an on ramp on an interstate
5. Transit Line: a line providing public transit
6. Curb Cut: a ramp leading smoothly down from a sidewalk to a street
7. Cut and Fill: the process of earth grading by excavating part of a higher area and using the material to fill in an adjacent lower area
8. Delta Angle: the change in angle of a curve
9. Freeway: a broad highway designed for high speed travel
10. Point of Reverse Curve: a point in a rail or road where a left or right curve is quickly followed by a curve in the opposite direction
11. Point of Tangency: point at which a tangent line intersects a curve
12. Sight Distance: length of the roadway ahead visible to the driver
13. Tangent Line: a straight line that just touches the outside of a curve
14. Vertical Alignment: a combination of tangent grades and vertical curves which defines the vertical location of a highway
15. Vertical Curve: a transition between two elevations
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