This is an east-west circular route combined with the 174 Rocklin/Coquitlam Central Station connecting Sun Valley in Port Coquitlam and Coquitlam Central Station. This route is the eastern half of the circular service. Service runs daily every 30 minutes and every 15 minutes during peak hours. On Sundays/holidays, service runs every hour, increasing to every 20–30 minutes during midday.
Eastbound trips depart from Coquitlam Central Station heading south on Lougheed Highway, east on Dewdney Trunk Road, south on Westwood Street, east on Kingsway Avenue, south on Maple Street becoming Bury Avenue, and east on Wilson Avenue to Port Coquitlam Station. Continuing from Port Coquitlam Station, the route heads west on Wilson Avenue, north on Shaughnessy Street, east on through the Shaughnessy Station Mall access road, east on Oxford Connector, north on Oxford Street, east on Coquitlam Avenue, north on Coast Meridian Road, east on Prairie Avenue, north on Cedar Drive, west on Victoria Drive to Victoria Drive & Rocklin Street where it continues as a 174 Coquitlam Central Station.
Westbound trips come off a 174 Rocklin and departs from the 900 Block on Victoria Drive heading east on Victoria Drive, south on Cedar Drive, west on Prairie Avenue, south on Coast Meridian Road, west on Coquitlam Avenue, south on Oxford Street, west on Oxford Connector, through the Shaughnessy Station Mall access road, south on Shaughnessy Street, east on Wilson Avenue to Port Coquitlam Station. Continuing from Port Coquitlam Station, the route heads west on Wilson Avenue, north on Bury Avenue becoming Maple Street, west on Kingsway Avenue, north on Westwood Street, west on Dewdney Trunk Road, north on Mariner Way, east on Barnet Highway, and south on bus access road to Coquitlam Central Station.
Early morning Cedar trips begin at Port Coquitlam Station.
When school is in session, two eastbound trips running with conventional buses in the afternoon start from Riverwood Gate & Amazon Street heading east on Riverwood Gate, south on Riverside Drive, west on Riverwood Gate, and north on Coast Meridian Road where it continues the regular routing and continues as a 174 Coquitlam Central Station at Victoria Drive & Rocklin Street.
May 2021 - Service in both directions revised to detour via Maple Street/Bury Avenue instead of McAllister Avenue between Maple Street and Mary Hill Road due to McAllister Avenue upgrades
September 2022 - Detour routing via Maple Street/Bury Avenue made permanent following the completion of McAllister Avenue upgrades and traffic pattern changes in the area. Service on McAllister Avenue and along Mary Hill Road discontinued
November 14, 2022 - Introduction of an additional PM westbound trip running when school is in session to address pass-ups at Kwayhquitlum Middle School
September 2024 - Introduction of two eastbound PM school trippers starting from Riverwood Gate & Amazon Street using conventional buses following the discontinuation of the Terry Fox/Archbishop Carney School Special
January 2025 - Sunday/holiday midday service increased from every hour to every 20–30 minutes