| Province: | AB |
| Type: | Hwy |
| Route: | 550 |
| Maint: | Alberta Transportation |
| Length Km: | 39.5 |
| Direction A: | West |
| Terminus A: | near Bassano |
| Junction: | near Duchess |
| Direction B: | East |
| Terminus B: | in Duchess |
| Rural Municipalities: | County of Newell |
| Villages: | Rosemary, Duchess |
| Previous Type: | Hwy |
| Previous Route: | 549 |
| Next Type: | Hwy |
| Next Route: | 552 |
Alberta Provincial Highway No. 550, commonly referred to as Highway 550, is an east - west highway in southern Alberta, Canada. It is a two-lane undivided highway in the County of Newell runs from the Trans-Canada Highway (Highway 1), southeast of the Town of Bassano, through the Village of Rosemary, to Highway 873 in Duchess.[1] Township Road 212 functions as a western extension of Highway 550 and connects to Bassano.[2]
Highway 550, along Highway 873 between Brooks and Duchess, was originally designated as part of Highway 2, which at the time was an east - west interprovincial highway that ran through Calgary and Medicine Hat (the present-day Highway 2 was designated as Highway 1).[3] In 1941, Highway 2 was renumbered to Highway 1 to allow for contiguous numbering through Western Canada along the future Trans-Canada Highway, which was commissioned in 1949.[4] In the mid-1950s, the Trans-Canada Highway was realigned between Brooks and Bassano, resulting in the Duchess-Bassano section being decommissioned and reverting to the County of Newell.[5] When the Secondary Highway system was established in the mid 1970s, the route became Highway 550.[6]
From west to east: