About Superelevation on Divided Roads

This section describes situations for divided roads and illustrates how superelevation is applied for each situation.

Divided Planar Roadways

The following illustration shows a divided road as the corridor type and the cross section shape is planar. The roadway undergoes adverse crown removal during superelevation:

Divided Crowned Roadways

The following illustration shows a divided road as the corridor type and a crowned cross section shape on each side. The roadway undergoes adverse crown removal during superelevation:

Median Treatments

In divided roadways, there are typically two options for superelevating each side of a divided roadway.

Note: For some pivot types, only one median treatment is valid. For example, a Divided Crowned Roadway that pivots at Centers can produce only a distorted median.

Maintain Median Shape

Maintain Median Shape means when superelevation is applied, the median raises to accomodate the superelevation. This option maintains the median shape, and the pivot points raise or lower.

Distorted Median

Distorted Median means when superelevation is applied, the median width remains that same, but either side raises or lowers to accomodate the superelevation. This option distorts the median shape, and the pivot points maintain their original position.