U.S. Route 1A - Portland, Maine

In Portland, Maine's largest city, the original routing of what was US 1A has largely been eliminated but a short section still exists mainly along Portland's waterfront. It now begins at exit 7 on the I-295 freeway (also known as Franklin Street). It travels east along the Franklin Street Arterial until its intersection with Commercial Street and the Maine State Pier. At this point it makes a 90-degree turn onto Commercial Street, which it will follow through the entire waterfront area passing such landmarks as Becky's Diner and the US Customs Service Portland office.

It then passes under the four lane ME 77/Casco Bay Bridge roadway, and then continues along Commercial Street (and the waterfront) until its intersection with Valley Road and the Veteran's Memorial Bridge Road. US 1A follows neither routing but instead turns west and north following the Fore River Parkway where it loops back to meet I-295 again at a complicated single-point urban interchange (exit 5) which also serves Congress Street (ME 22), where US 1A now terminates.