Since 2010, the planning and timetabling of these bus routes have been done by Helsinki Region Transport, an organisation to which the aforementioned municipalities belong. Prior to HSL's inception, Helsinki's internal lines were the responsibility of Helsinki City Transport, with all other bus services being organised by YTV, HSL's predecessor.
Principles of line numbering
Bus lines running solely inside the municipality of Helsinki have two-digit numbers, except for lines 52 and 53, which extend into Espoo, as well as trunk line 30 and night line 95N, both of which extend into Vantaa. Three-digit numbers are used by all other lines, (except for Helsinki internal lines 500, 506, 611B and 831(K), as well as part of Helsinki's minibus routes).[1]
Some lines have a letter or two at the end of their number, for example 611B. This denotes that the line differs from the main route in some way. For example, the route of line 611B is shorter than that of line 611. These letters mean the following:
A = a lengthened route
B = a shortened route (denotes an evening route for lines 82B)
R = a line operated by a robot bus (all lines have been discontinued)
T = a lengthier route, often involving serving long cul-de-sacs or (occasionally) termination somewhere different (in the case of buses to southern Espoo this denoted going via Lauttasaari)
V = a quicker route, usually going along more main roads, or via an industrial area, usually only during peak hours OR a metroreplacement bus terminating at Vuosaari.
Z = a quicker route, usually along more main roads or highways, again usually only during peak hours.
Operation hours
The majority of lines run between 5:00 and 23:30, with more popular lines continuing until 1:30. Only a small amount of lines run between 1:30–5:00 on weekdays, mainly trunk lines and lines to/from Helsinki Airport.
Night lines run mainly on weekend nights between 1:00 and 4:00. This is the only time that most areas have a direct bus connection to central Helsinki, as most daytime bus lines are feeder lines to a train or metro station. Night lines in east and northeast Helsinki and southern Espoo are an exceptional case in the HSL area, as most lines in these areas tend to start operation between 23:00 and 00:30. Individual lines in other areas may also start at this time. The main reason for this is that the metro stops running at around 23:30, rendering feeder lines in east Helsinki and southern Espoo useless after this time.
Trunk, minibus and U lines
Most buses in the HSL area run on the same principle. Most are blue at the front and white at the back, and carry multiple logos of both HSL and the actual operator of the bus. Electric buses also carry a cable and plug decal on each side. Boarding is through the front door only, where you show your ticket to the driver or card reader. Generally, buses do not stop at every bus stop, to speed up journey times and to improve fuel efficiency; thus passengers waiting at a stop are expected to hail an approaching bus by waving.[2]
Buses that operate on trunk lines, are orange at the front, instead of blue. Card readers are also provided at the middle doors (and rear doors on articulated buses), through which you may also board. These buses therefore work on a proof-of-payment system, like rail-based transport in the HSL area. These buses can run as frequently as every 6 minutes during the peak; nowadays, most run until 2:00, with some running around the clock.
Not all areas have the traffic or road space to accommodate full-size buses. Therefore, some bus lines, like the 26 in Salmisaari or the 167 in Kauklahti, are run with smaller minibuses. These have a similar colour scheme to, and work on the same principle as normal HSL buses. These typically have around 15 seats. These same minibuses also run neighbourhood lines.[3] These go up much smaller residential streets, utilising tight turning circles, and can stop anywhere on a road, as long as it is safe to do so.
Many internal and regional lines have their central terminus in either Rautatientori or Elielinaukio, with the other in a residential area. Most lines in east Helsinki are feeder lines to metro stations: in this case, the central terminus is at a metro station. In north Helsinki and Espoo, as well as Vantaa, Kerava and Kirkkonummi, some lines operate as feeders for commuter rail stations, like Tikkurila, Kerava, Leppävaara, Myyrmäki and Espoon keskus.
There are also many lines that cross municipal borders in the HSL area. Most terminate at a local railway station, and act as feeder lines. Lines passing through Kauniainen are considered as Espoo internal lines.
Outside of the central areas, especially in Kirkkonummi, Sipoo and Siuntio, internal lines are focused mainly or entirely on commuting to school and work, and are heavily subsidised. Outside of peak hours, these lines run rarely, if at all. This makes them fairly useless for leisure travel.
The public transport provision and service level in Espoo, Vantaa and Kerava is not as good as that provided in southern Helsinki, but it is fairly good compared to the rest of Finland. In these areas, the public transport can be compared to that of Tampere and Turku, which are of a similar size.
Helsinki internal lines (two-digit lines)
24h means that the line also operates on weekday nights (from 1:30-5:00):