Note: Some online mapping services will route you via Exit 82 (OLD Exit 10) and through Harwich Center.
That route is more confusing for the first-time visitor but is a bit shorter! So here's the better way:
Go under Route 137 and then exit...Pix taken before Cape Cod Rt 6 exits were renumbered in 2020.
The building in picture is the Chatham Chamber of Commerce information booth...
And yes, Route 28 on Cape Cod is weird! In this case, "North 28" goes West...
Which gets you to South Chatham, located west of West Chatham, another oddity!
For those who want to get to Hyannis (like us locals do!) and avoid Rt. 28, here's a link to a Google Maps showing the way: