Road Type Data files have an extension of .ctr.  Using the dialog box, navigate to
the desired folder, selected the desired file and click Open.  This will import all Road Type
Data in the selected file.  Note that any Road Types already in the current drawing of the
same name as imported unit types will be overwritten. Users should rename any
existing Road Types before importing.

Land Planner Suite installs some sample Road Types.  The file is cadtracts Sample Roads.ctr
and can be found in the install folder (default is Program Files/CadTracts/LandPlannerSuite).