1. http://www.kkr.mlit.go.jp/plan/pt/research_pt/h22/pt_h22.pdf
2. http://www.openstreetmap.org
3. http://www.city.kobe.lg.jp/information/data/statistics/traffic/keikaku/img/22census_w.xls
4. Krajzewicz D, Erdmann J, Behrisch M, Bieker L (2012) Int J Adv Syst Meas 5:128
5. http://www.sumo.dlr.de/wiki/NETCONVERT