Impedance future

Network functions Impedance future

possible extensions

1. Log-logistic distance decay: d -> 1/(1+e^a+blnd) = 1 / (1+e^ad^b).

possible speedup optimizations

1. Parallel processing of different OrgZones, as most time is now spent in growing trees, which can be done per origin zone separately, a speedup factor is expected close to the number of available cores.
2. Pre-processing, overview: http://algo2.iti.kit.edu/schultes/hwy/dynamic.pdf using:
   • highway hierarchies along the lines of http://algo2.iti.kit.edu/schultes/hwy/distTable.pdf, and http://algo2.iti.kit.edu/schultes/hwy/esaHwyHierarchiesSlides.pdf
   • edge reduction
   • transit node routing and separators
   • A* methods, geometric containment and goal direction search, useful only for individual OD-pairs.

see also

• Impedance general (formerly known as Dijkstra)
• Impedance key entities
• Impedance functions
• Impedance options
• Impedance warning
• Impedance interaction potential
• Impedance additional
• Impedance links