I'm planning it, but I'm dreading it. I actually did videos on every layout for Reddit (back when I thought I could get r/racetrackdesigns to offer advice on the map updates) and it was kind of depressing honestly.
Some suggestions by me (+ info about Traffic tool compatibility): 1. https://www.beamng.com/resources/crimson-valley.1674/ Old, IDK about traffic works here. 2. https://www.beamng.com/resources/adirondack-pass.8565/ New, but traffic are messed up. 3. https://www.beamng.com/resources/american-road.3100/ Traffic tool works nice. 4. https://www.beamng.com/resources/bizona-desert.7110/ Don't test traffic on this map actually.
Have Crimson Valley, navigation/minimap do seem to work there so traffic tool may work but I only use that for freeways. Tried Adirondack Pass, didn't like it much. Have American Road and will be doing writeups on it at some point. Bizona I tried, not really sure about it, may go back and check it out again later.