Called Portland Street at its western end, the route starts at Alderney Drive (Trunk 7) across from the city hall of the former city of Dartmouth. There it proceeds where it intersects with Prince Albert Road (Trunk 7), Alderney Drive and Canal Street. Further along, Portland Street junctions with Route 322 at Pleasant Street, and Albert Street, an area in Dartmouth called "The five corners" . It passes through the Southdale area of Dartmouth, then expands to a four-lane street where it crosses the Circumferential Highway to the Portland valley area. it then extends up an incline named "Heartbreak Hill " to the community of Cole Harbour.