The frequency of the various factor

The frequency of the various factors that were checked and the distribution of the rank scores do not
show any overwhelming dominations. Table 2 gives the distribution of the responses, frequency
percentage (Freq. Per.), and the mean of scores (M. S, S j ) and standard deviation of the rank scores (S.
D.). There are five factors that were considered to be important by more than half of the respondents:
waiting time (WAI), punctuality (PUN), travel time (TVL), convenience 1 (CN1), and environment
(ENV). The first three factors are time dependant factors. In the next stage, due to the air pollution
problems in the metropolitan area of Tehran, environmental impacts have a high frequency of selection as
an important factor for the public transport assessment. According to the returned questionnaire by the
respondents, Convenience (CN1) in the vehicle, enough seats, with a percentage of 54% seems to be
another significant factor. In general, operating cost (OCS), receiving about 16.2% of the responses, was
considered as the less important criteria.