British Columbia Highway 4
Highway 4 is the longest east–west main vehicle route on Vancouver Island, British Columbia, Canada, with a total length of . It is known locally as the "Alberni Highway" to the east of Port Alberni and the "Pacific Rim Highway" to the west. The original highway from Parksville to Alberni and Port Alberni was completed in 1942 and was originally designated as Highway 1A. It was re-designated as Highway 4 in 1953, and was extended in 1961 to the district of Tofino, on the west coast of the Island. Route details. Highway 4's eastern  terminus is at the interchange with Highway 19 at Qualicum Beach; however, the roadway continues north as "Memorial Avenue" for to Highway 19A. From Highway 19, it travels south for to a junction with an older Alberni Highway segment, now known as Highway 4A, at the small community of Hilliers in Coombs. Highway 4 veers directly west upon meeting this junction. The majority of Highway 4's length is composed of a two-lane configuration. An inactive subdivision of the E&N Railway parallels Highway 4 all the way from the coast near Parksville to the city of Port Alberni. West  of Coombs Junction, Highway 4 travels for before meeting Cameron Lake. Highway 4 hugs the shore of Cameron Lake for , then winds its way through MacMillan Provincial Park, which includes a tourist attraction known as Cathedral Grove. After Cameron Lake, Highway 4 climbs for , following the Cameron River, to the Port Alberni Summit—the highest point on the highway (elevation: ), known by locals as "The Hump", at which it crosses from the Regional District of Nanaimo into the Alberni-Clayoquot Regional District—and then descends for to a spur that travels into the city centre of Port Alberni. Highway 4  enters the city limits of Port Alberni west of the main spur into the city, and later, exits Port Alberni via a bridge over the Somass River. Major intersections. From east to west: Highway 4A. Highway 4A is the previous alignment of Highway 4 east of Coombs. The '4A' designation was originally assigned in 1968 to the current section of Highway 4 between Coombs and Qualicum Beach. The 4 and 4A alignments east and north of Coombs, respectively, switched designations when the Parksville to Mud Bay section of the Inland Island Highway was completed in 1996. This older spur of  Highway 4 terminates in the east at Parksville, from Coombs.