The Co-Evolution of Land Use and Transport: Theory and Application to London. David Levinson University of Minnesota Imperial College, London February 21, 2007. With Bhanu Yerra, Feng Xie, Shanjiang Zhu, Ahmed El-Geneidy. General Points.
University of Minnesota
Imperial College, London
February 21, 2007
With Bhanu Yerra, Feng Xie, Shanjiang Zhu, Ahmed El-Geneidy
This extension of the railway system by means of feeder lines means that in many ways the early development of the system can be viewed, not in terms of booms and slumps, but in rational steps. By the end of 1833, three of the five English provincial towns with a population of more than 100,000 had railway links with London under construction; by the end of 1836 only Portsmouth remained among English towns of over 50,000 population without a line authorized; and by the end of 1837 most towns of more than 20,000 inhabitants were on or close to the route of an authorized railway. - M.C. Reed
3. Mode Choice
Single mode is assumed
4. Traffic Assignment
Calibrated Stochastic User Equilibrium (SUE)
1. Revenue Model
2. Cost Model
3. Investment Model
SONG (fixed Land Use) Application to LondonBase Case: Uniform Initial Speeds and Land use (U/U)(left) Spatial distribution of uniform speed for the initial network; (right) Spatial distribution of speed for the network at equilibrium reached after 8 iterations.
Random initial speeds and random initial land use Application to London(R/R)(left) Spatial distribution of initial speed for experiment R/R (random initial speeds and random initial land use); (right) Spatial distribution of speeds for the network after reaching equilibrium; The color and thickness of the link shows its relative speed or flow.
Uniform initial speeds and bell-shaped initial land use Application to London(U/B)Spatial distribution of final speeds for experiment U/B (uniform initial speeds and bell shaped land use)
Equivalent radius (r)
Ej= employment of zone j
dj= distance of zone j to the center of a region
Evolution of employment without network dynamics
Evolution of employment with network dynamics
1 less equitable
0 more equitable
Random initial speeds and bell-shaped initial land use Application to London(R/B)(top) Spatial distribution of initial speed for experiments R/B (random initial speeds and bell shaped land use); (bottom) Spatial distribution of speeds for the network after reaching equilibrium
Gravity model parameter variations with uniform network and land use (U/U) Spatial distribution of relative speeds at equilibrium for (top)w = 0.02 (less sensitive to travel cost); (bottom)w = 0.8 (more sensitive to travel cost).