less than 1 hour

1-

http://www.dailymail.co.uk/femail/article-1023183/Heathrow-home-Meet-100-homeless-people-live-airport.html

2- https://www.mlit.go.jp/koku/15_hf_000020.html

for this web site use this PDF :

http://www.mlit.go.jp/common/000186704.pdf

3- http://www.worldairportawards.com/awards_2012/security.htm

4- http://www.cityofchicago.org/content/dam/city/depts/obm/supp_info/2013%20Budget/2013Overview.pdf

5- http://www.railway-technology.com/features/featuredriverless-train-technology/

6-

http://jpgmag.com/stories/15907

7-

http://www.railway-technical.com/sigtxt4.shtml

8-

http://articles.chicagotribune.com/2007-02-19/news/0702190188_1_people-mover-roadway-airport-transit-system

9-

http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=00870001