Locally, there were also some resea

Locally, there were also some researches done using the
data collected from EZ-Link, Singapore‘s smart card used for
public transit. Lee et al [6] did a case study to optimize
serviceability and reliability of bus routes by running
statistical analysis on the EZ-Link data collected from bus
transit trips. Sun et al [7] also did a study using the EZ-Link
data collected from public train transit to estimate the
spatial-temporal density passenger onboard a train or waiting
in the train station.
In the literature, there is a large body of work on applying
statistical analysis on the smart card data collected from
public transit trips. However, few researches were able to deal
with the growing large amount of temporal data effectively or
were there any extensive study done using the smart card data
to reveal the commuters‘ travel patterns.