Reliability of Stockholm Subway - Index of

station where special electronic display located at the track for the north bound trains.
This display shows the precise time in seconds elapsed since passage of previous
train. One can call Gullmarsplan a key station of the Green line, because the line
traffic control center is situated here as well.
Alvik is another station with a large number of boarding people. The figure reaches
17 000 passenger per regular business day. Alvik is also an important transfer node in
East Stockholm. At the station passenger can change to tram line Tvärbanan and light
rail line Nockebybanan. The station has two platforms. The first platform is for
subway train going to Hässelby strand and for the train leaving for Nockeby. The
second platform is used for the arriving train of Nockebybanan and subway trains of
southern direction.
Skärmarbrink is a station where routes T17 and T18 split and take their own tracks.
That is the reason why it has two platforms and four tracks to separate the trains of the
different directions.
4.2.3 Peak hours
During the period from 2008-03-11 till 2008-03-12 there were collected data on
passengers entering and leaving the subway system with the help of turnstiles at a few
stations. The data allow identifying the individual peak hour at every investigated
station. Nonetheless, in the thesis we will consider the average peak hour periods
peculiar to the whole network.
Turnstiles or fare gates control fare payment and are located at any station in the
intermediate mezzanine levels between the street and platform levels. The fare gates
allow entering the subway system after fare payment or leaving the station when the
trip is over. Every fare gate opening is identified as one person entering or leaving the
station. However, the results could not be precise because in some cases the
construction of the gate allows several people to pass through it at once. There are
38