The beta for The Crew ends today, so hopefully you were able to drive across the entire map of the US.
One beta player did. It took him 40 minutes to drive across the entire country from the east to west coast. The entire drive was documented and posted on YouTube.
If you have 40 minutes to spare, you should give it a watch. The map is shown at the beginning of the video, and while it looks a bit odd compared to the actual shape of the US, the shape is formed by the different driving routes.
The Crew is slated for a November 11 release on PC, PlayStation 4 and Xbox One.