OC Transpo is a public transit authority that operates about 160 bus routes (as of January 2017) in the Ottawa-Gatineau region of Canada. It also operates the O-Train.
Black: These routes generally operate seven days a week, from about 6:00 AM to midnight Monday through Saturday, and from about 7:00 AM to 11:00 PM on Sundays and most holidays. However, if a route, or a section of a route, does not operate during certain time periods, it will be gray on the bus stop flag. Some routes provide morning service as early as 4:00 AM on weekdays, and 5:00 AM on Saturdays. Ottawa's three major Transitway routes (routes 95, 96, and 97) also provide early morning service on Sundays. Route 95 operates 24 hours a day, seven days a week, while route 97 operates 24 hours a day Mondays-Saturdays. The fare on regular black routes is currently $3.40 cash, $3.35 with a Presto card, or two bus tickets.
Grey: Grey is used to signify limited service, which means that these routes usually run from 6:00 AM to 8:00 PM or 9:00 PM on weekdays. Some routes, such as route 161, operate with limited service between 9:00 AM and 3:00 PM, with some operating with limited service after 6 PM. There is usually no weekend service on these route if they run during the week. A few only run on weekends and/or weekday evenings. The fare on grey routes is currently $3.40 cash, $3.35 with a Presto card, or two bus tickets.
Red: These routes generally operate Monday through Friday from around 6:00 AM to 9:00 AM, and from around 3:00 PM to 6:00 PM. They usually operate in one direction in the morning, and the opposite direction in the afternoon. The fare on the red routes is currently $3.40 cash, $3.35 with a Presto card, or two bus tickets.
Purple: These routes generally operate Monday through Friday from around 6:00 AM to 9:00 AM and from around 3:00 PM to 6:00 PM. All purple routes travel towards downtown Ottawa in the morning, and towards the suburbs in the afternoon. Most purple routes travel to suburban areas, but some of them also travel to rural areas. The fare on purple routes is currently $3.40 cash, $3.35 with a Presto card, or two bus tickets.
Blue: Blue is used to signify Bus Rapid Transit (BRT) routes that will service the region after the Confederation Line opens in 2018.