This is a north-south route connecting Scottsdale Exchange and Scott Road Station running primarily through 112 Street in Delta. Service runs daily every 30 minutes, increasing to every 20 minutes during peak hours.
Northbound trips depart Scottsdale Exchange heading west on 74 Avenue, south on Scott Road, west on 72 Avenue, north on 112 Street, east on 92A Avenue, north on 114 Street, east on 96 Avenue, and north on Scott Road to Scott Road Station.
Southbound trips depart Scott Road Station heading south on Scott Road, west on 96 Avenue, south on 114 Street, west on 92A Avenue, south on 112 Street, east on 72 Avenue, north on Scott Road, and east on 74 Avenue to Scottsdale Exchange.
Early morning northbound trips do not serve the stop on Scott Road & Lien Road. The first weekday southbound trip begins from 96 Avenue & Scott Road.
March 1982 - New Downtown Vancouver terminus routing: From Melville at Thurlow to Melville, Thurlow, Hastings, Howe to regular route [2]
April 1987 - Service extended from Scottsdale Mall to 22nd Street Station via Alex Fraser Bridge[3]
September 1988 - Service extended from Whalley Exchange to Guildford Mall on Mondays–Saturdays during the daytime to replace portions of the New Westminster–Guildford 320 short-turn service[4]
March 1990 - Northern terminus moved to Scott Road Station. Service replaced portions of the discontinued 390 Scott and 96 Avenue/22nd Street Station. Service between Scottsdale Mall and 22nd Street Station and between Scott & 96 and Whalley Exchange discontinued[5]
November 1999 - Route became wheelchair accessible[6]
December 2002 - Temporary southbound reroute near Scottsdale revised due to traffic congestion made permanent and revised to be for all trips: Routing revised to go via 72 Avenue, Scott Road, 74 Avenue to Scottsdale instead of via 72 Avenue, 122 Street, 74 Avenue
April 2021 - Evening service daily in both directions increased from every hour to every 30 minutes and northbound Saturday trips were revised to start 90 minutes earlier
April 2023 - Various weekday service increases
Northbound AM peak hour service increased from every 25 minutes to every 20 minutes
Southbound late afternoon service increased from every 25 minutes to every 20 minutes
Southbound late evening service increased from every 35 minutes to every 30 minutes
January 2024 - Service renamed from 312 Scottsdale/Scott Road Station to 312 112 Street
September 2024 - AM peak service increased from every 20–30 minutes to every 15–20 minutes and weekday evening service increased from every 20–30 minutes to every 15–20 minutes