Superelevation Preferences
The following screen captures illustrate the settings for the AASHTO 2004 superelevation preferences. The AASHTO 2001 preferences are similar except as noted.
The following dialog illustrations are for information only. Normally, there is NO NEED TO ADJUST ANY OF THESE SETTINGS.
Some people refer to the Superelevation Preferences dialog as "The Monster". It really is a little intimidating, but GEOPAK helped us set this up and you really shouldn't have to change anything.
- e
- Runoff Length
- Tangent Runout
- Adjust Factors
- Distribution
- Rotation
- Reverse Curves
- Compound Curves
- Short Curves
As mentioned earlier... these settings have been completed for you, and the following dialogs illustrate their correct settings. The help files included with your GEOPAK Software have very good explanations of all these Tabs and their variables. I don't intend to repeat what has already been explained there. Instead, I've simply shown the settings for use in WFLHD.
The "e" Tab
Also on this Tab is a data field where the software looks to find the "e" radius table. Use the
Files button and select either english_2004_radiusTable_e.csv or metric_2004_radiusTable_e.csv).
Both are currently located at:
- X:\V8_Resource\X_30\Standards\Bin\English
- X:\V8_Resource\X_30\Standards\Bin\Metric
NOTE:
When using an AASHTO 2001 preference file the "e Rounding Increment" will be 0.100000
The Runoff Length Tab
Also on this Tab is a data field where the software looks to find the
"length" table. Use the
Files button and select the file, (fhwa_uscust_length.csv or
fhwa_metric_length.csv).
Both are currently located at:
- X:\V8_Resource\X_30\Standards\Bin\English
- X:\V8_Resource\X_30\Standards\Bin\Metric
The Tangent Runout Tab
The Adjust Factors Tab
The Distribution Tab
Note that the percentage shown will match the superelevation preference file name.
(i.e. FHWA_US_2004_80_20.sep -> 80%)
The Rotation Tab
The Reverse Curves Tab
The Compound Curves Tab
The Short Curves Tab
After verifying that each of the Tab settings on your workstation are set as shown, click on the X in the upper right corner of the dialog to close it and click on OK back on the GEOPAK User Preferences dialog.