This section describes situations for undivided roads and illustrates how superelevation is applied for each situation.
Undivided Crowned Roadways
The following illustration shows an undivided road as a corridor type and a crowned cross section shape. During superelevation, the simple crowned roadway undergoes adverse crown removal. In this illustration, the adverse crown removal is the distance from End Normal Crown to Reverse Crown:
Undivided Planar Roadways
The following illustration shows an undivided road as the corridor type and the cross section shape is planar. There is no crown, therefore no removal of adverse crown is necessary. This type of roadway typically has a downward slope in one direction on the unsuperelevated sections. Because of this, the distance required to achieve full superelevation varies depending on whether the superelevation continues in the direction of the downward slope or superelevates in the direction opposite to the normal downward slope. This example is typical of ramps, one-way traffic roads, and some service roads.
