Urbanization 
1.  The following link is to a series of power points
 

2. The following is a web site to help understand patterns of social segregation and the process of

     gentrification (3.8.4  Urban morpohology -  Residential zones)

http://www.santafe.edu/events/workshops/images/a/a3/Segregation.pdf

 3.  The following is a power point to suppliment the  London Congestion Charging case study

       CaseStudyLondonCongestionCharge.ppt