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Calculate Superelevation - Shoulder Control Page

Product Documentation
Intermediate
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Use this page of the wizard to specify the shoulder treatment.

Inside Median Shoulders and Outside Edge Shoulders

Note

The Inside Median Shoulders section is disabled if you specify Undivided Crowned or Undivided Planar as the Roadway Type on the first page of the Superelevation wizard.

Calculate

Clear the Calculate button to disable Normal Shoulder Width and Normal Shoulder Slope.

Normal Shoulder Width

Specifies the typical width of the shoulder, either inside or outside.

Normal Shoulder Slope

Specifies the % slope value of the roadway shoulders.

Shoulder Slope Treatment

Select one of the following treatments for the Low Side and High Side:

  • Default Slopes: Default slopes are retained and shoulders are not superelevated.
  • Match Lane Slopes: Shoulder slopes match the slopes applied to the adjacent traveled ways through out the superelevation process.
  • Breakover Removal: Shoulders on the outside edge of the curve are adjusted upward to match the Normal Lane Slope (%) before the lane begins to superelevate. The highside shoulder slope matches the highside lane slope throughout the superelevation process, and it then rotates downward back to the Normal Shoulder Slope (%) value when the lanes are back to the unsuperelevated condition.
Maximum Shoulder Rollover
Specifies the maximum value for shoulder rollover, and then calculates the alignment stations (Begin Shoulder Rollover and End Shoulder Rollover) at which the maximum value is exceeded and met. Between those stations, shoulder slopes are raised just enough to maintain the maximum shoulder rollover value. This reduces the grade break between the lane and the shoulder.
NoteThe Maximum Shoulder Rollover value must be the same for both Inside Median Shoulders and Outside Median Shoulders.

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