With the version 3.0 and later AutoDrive add some road types (one way roads). These are custom types, in order to display the one way arrows. I think that this is a lack of the software. If the software detects an invalid type then ignores all the types that are included to the TYP file.
The same problem happens with my map, because has a lot of custom roads (and other line types) and the software ignores all lines.
You can use the "Change TYP File" program, which you can download it from [Only registered and activated users can see links. ] (including a TYP with no lines) to create your own .img file, or you can use the GMapTool and use the method described here (at any case use the TYP file from the zip file that I included with the "Change TYP File" program.
Note that in that case all the line types that Garmin has not a standard type to display(like European and National paths, steps and 4x4 tracks) will be displayed as black lines and all the custom line types that are not standard Garmin types will be ignored and will not been displayed by the software.
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