Start by offsetting your alignment to create a polyline object along the centerline of the travel lane or whatever your local standards and regulations stipulate. Issue the TLSightDistance command and adjust the Distance and Step Parameters then select your alignment. The app will generate sightlines of varying length along the alignment at "Step" intervals, connecting points exactly "Distance" apart measured along the center line of the alignment thus visualizing the sight distance "envelope".

All generated lines will be combined in an anonymous group for easy manipulation.

Press the "Esc" key at any point to abort the command.

Note that in order to maximize compatibility the command is designed to work with standard Autodesk® AutoCAD® polylines and not Civil 3D objects.

The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin. You may need to restart the Autodesk product to activate the app/plug-in. To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button. OR, click Control Panel > Programs > Programs and Features (Windows 7/8.1/10/11) and uninstall as you would any other application from your system.