Calculating Sight Distance Along a Corridor

2012-03-14

Product Documentation

Intermediate

Use this tool to calculate sight distances along a roadway and to ensure that the design meets the required minimum sight distances.

When the minimum values are not met, the area is flagged in a report and graphically highlighted in the model.

Note

All graphic elements are drawn as blocks on the specified layers so that you can easily select them all and delete them if necessary.

To check sight distance along a corridor

Click Analyze tabDesign panelVisibility Check drop-downCheck Sight Distance.At the Command prompt, enter SightDistanceCheck.
On the Sight Distance Check - General page, specify the path along which you want to check.

Note
To enable the Next and Finish buttons you must specify a valid sight path.
Select a surface to perform the check against and click to add it to the list. The surfaces are listed in the order of priority. If there are multiple surfaces at a given location, then the check is done against the surface with the highest priority. You can change the priority by clicking the and arrows.
Click Next.
On the Sight Distance Check - Sight Distance page, enter values for the following:
- Minimum Sight Distance
- Eye Height
- Eye Offset
- Target Height
- Target Offset
Click Next.
On the Sight Distance Check - Results page, select the sight distance graphic components that you want drawn in the model. You can hover over a component in the list to see a preview.
Click to select a hatch color for the display of the obstructed areas.
Optionally, create a sight analysis report. From the Choose A File Type list, specify one of the following report style sheets:
- ReportCSV
- ReportHTML
- ReportTXT
- ReportXML
Specify the location to save the report. Click Finish.

Note
All graphic elements are drawn as blocks on the specified layers so that you can easily select them all and delete them if necessary.