When working with alignments, the term P.I. refers to:

When working with alignments, the term P.I. refers to:

• A. the Point of Intersection
• B. Point of Inversion
• C. Primary Intersection
• D. Point of Inclination

Answer: (A)

Point of Intersection is the point where the extended lines of the two tangents in an alignment meet. It marks where the direction changes and where a curve is placed between the straight segments. In Civil 3D alignment design, you use this point as the reference to define the transition from one straight portion to the next, often using a curve with a chosen radius tied to that intersection. The other terms aren’t standard in this context, so they don’t describe the location or function of the change in direction in an alignment.

Point of Intersection is the point where the extended lines of the two tangents in an alignment meet. It marks where the direction changes and where a curve is placed between the straight segments. In Civil 3D alignment design, you use this point as the reference to define the transition from one straight portion to the next, often using a curve with a chosen radius tied to that intersection. The other terms aren’t standard in this context, so they don’t describe the location or function of the change in direction in an alignment.