The angular change in direction between the tangent to the curve at the start and the tangent to the curve at the end is called:

The angular change in direction between the tangent to the curve at the start and the tangent to the curve at the end is called:

• A. Beta
• B. Gamma
• C. Theta
• D. Delta

Answer: (D)

The change in direction from the initial tangent to the final tangent of a curve is called the deflection angle. It measures how much the path rotates as you move along the curve, and is the key quantity designers use to relate the two tangents, the curve length, and the radius. In Civil 3D and highway design, this angular change is typically denoted by delta, reflecting its role as the amount of deflection the curve imposes. The other Greek letters are used in different contexts and don’t describe this specific measure of turning along a curve.

The change in direction from the initial tangent to the final tangent of a curve is called the deflection angle. It measures how much the path rotates as you move along the curve, and is the key quantity designers use to relate the two tangents, the curve length, and the radius. In Civil 3D and highway design, this angular change is typically denoted by delta, reflecting its role as the amount of deflection the curve imposes. The other Greek letters are used in different contexts and don’t describe this specific measure of turning along a curve.