Administrative Procedures Guide
Transportation System Development Charge administrative rules
http://www.portlandonline.com/auditor/index.cfm?c=31884&a=62417

City Code 17.15
Transportation System Development Charge code
http://www.portlandonline.com/auditor/index.cfm?c=28848

TSDC Rate Comparison
Results of a metro-wide rate comparison survey

Development Cost Comparison
A metro-wide summary of all SDC charges and some common development costs for select development types

Effects of SDCs on Development
A summary of research about the effect of SDCs on development