Superelevation runoff is the length along a highway needed to accomplish the change in cross slope between a roadway section with adverse crown removed and a fully-superelevated section. Tangent runout is the length along a highway needed to transition between sections with adverse crown removed and a normal-crown section. The 3.6-meter lane width should be used for all lane widths between 3.0 meters and 3.6 meters. Tangent runout should be effected at the same rate used for superelevation runoff.
Spiral curves are desirable to accomplish superelevation runoff.
A. Start Windows NT Explorer and connect the LRC student volume. Set the standard COGO preferences for this class. Review the superelevation factors. E. Store the points for the centerline. Store Point Number 1 at a Northing of 5000 and an Easting of 5000 .