Incorporating Space-Time Correlation of Population Densities into the Design of a Candidate Rail Transit Line over Years

Table 1

Parameters.

Symbol	Definition	Value
)	Variable cost for rail service	3
)	Daily unit fixed maintenance cost of rail line	10^6
)	Daily fixed operation cost of each rail station
	Coefficient of variation of population density	0.3
)	Fixed component of fare for using the rail service	4
)	Variable component of fare per unit distance	0.1
	Fleet size of trains in base year 0	5
)	Average daily household income	400
	Initial value of rail length in year 0	20
	The planning and operation time horizon	3
	Initial value of rail station number in year 0	20
	Sensitivity parameter in travel demand function	0.02
	Initial value of total population in year 0	100000
	Parameters of households’ utility function	0.2/0.8
	Average daily housing rent in the CBD	300
	Average access time	400
	Average train speed in year 0	60
	Housing supply in year 0
	Interest rate	0.01
	Growth rate of the total population along the transportation corridor	0.1
	Probability of gaining budget social welfare	95
	Constant terminal time	5/60
	Parameter of waiting time function	0.5
	Parameters for travel cost function	80/100/60