Table 5 Table of classification of variables into three groups according to the variable’s variances
From: Factors affecting performance improvement of the metro system in cities
Factor 1 indicators | Factor 2 indicators | Factor 3 indicators |
|---|---|---|
Reliability | Safety from crime\station | Safety from crime\trains |
Accident | Safety from crime on trains | Distances between stations |
Safety from crime at stations/stops | Length of system/km | Area of the city |
Population | Number of lines | Frequency |
Total annual income per capita | Number of stations | Age of infrastructure |
Safety from crime on trains | Pollution and noise | Pet friendly |
Trip time between two consecutive stops | Frequency | Â |
Integration | Â | Â |
Number of stations | Â | Â |