RL2: Roadway Curvature

Definition:

The measurement of the curvature in the roadway expressed in terms of its radius, length, and superelevation. The unit of measurement is feet.

Source: Obtained by linking Crash Location (C5) to the Roadway Inventory data. See Roadway Alignment and Grade (V16).

Element Attributes:

Not Applicable

Subfield 1:

Curve: Radius

Subfield 2:

Length

Subfield 3:

Superelevation

Rationale:

Curve data is used in searching for and diagnosing high-crash locations. Important for determining relationship between horizontal alignment-related crashes to guide future highway design, speed limits, and driver skill training
(motorcycle curve entering speed, etc.).