A Framework to Assess the Correlation between Transportation Infrastructure Access and Economics: Evidence from Iran
Table 1
The equations to calculate access of cities to rail, road, and air networks.
Transportation mode
Equation to calculate access
Parameters
Road access
P n = population of city n, Z = number of the studied cities in the case study, dn,n+1 = temporal distance of city n and n + 1 (min), Rn = the time required for traversing the radial distance of the city (city center to the terminal border of the city).
Rail access
d n = temporal distance of city to closest railroad station (min),
