Attachments:

canada_roads.zip	[Canada roads]
cuba_highway.zip	[Cuba highways]
greece_roads.zip	[Greece roads]
haiti_roads.zip	[Haiti and Dominican republic roads]
usa_roads.zip	[USA roads]

From this page you can download examples of shape files (*.shp) describing roads in different countries.

Roads and highways in Greece, Haiti and Dominican republic, Cuba, USA, Canada:

It is possible to use roads from these files for GPS simulation as described in this video:

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