Added new option save-state.period<TIME> to save simulation state periodically. #2441
Added new option save-state.suffix<STRING> to determine the suffix of saved state files.
The default is .sbx which saves in a binary format.
Alternatively, .xml may be used which makes the state files
Networks exported to OpenDRIVE now use parametric curves to
represent smooth geometry in place of straight-line segments. #2041
Networks exported to OpenDRIVE now contain elevation data. #2240
Parametric curves as specified in OpenDRIVE version 1.4 can now
be imported. #2478
Revised default OpenDRIVE typemap. Now imports additional lane
types such as tram and rail. #2492