Highway curvature and gradient data in sections across Colorado since 1998. Contains detailed data on selected roadways, including rigidity, flexibility, curvature, grade, sight distance, speed limits, length of green time, etc from the Colorado Department of Transportation (CDOT).

Road curvature and gradient data in sections across Colorado, from the Colorado Department of Transportation (CDOT), since 2000. Contains roadway sections and various data about them: road width, thickness, curvature, grade, speed limits, signals, etc.

Highway grades in sections across Colorado. Contains detailed data for state highways, including grades from the Colorado Department of Transportation (CDOT).

Highway curvatures in sections across Colorado. Contains detailed data for state highways, including curvature from the Colorado Department of Transportation (CDOT).