TDM: Transportation Demand Management and Parking
Found this new site, the Online TDM Encyclopedia. I’m investigating the impact of TDM Measures… My question is whether reducing the number of parking spaces in the District of Columbia will reduce the overall number of trips during peak hours… The TDM encyclopedia doesn’t cover this very well, but there are some interesting ideas, such as Pay-As-You-Drive insurance for autos. Let me know what you think in comments.
Travel Impacts
Pay-As-You-Drive insurance averages about 6¢ per mile. The table below shows the vehicle travel reductions predicted from mileage-based fees. The Transport Elasticities chapter provides additional information on the travel impacts of various price changes.
(for tables visit http://www.vtpi.org/tdm/tdm79.htm)
This indicates that PAYD pricing should reduce affected vehicles’ annual mileage by 8-10%, with larger reductions by higher-risk motorists, since they pay higher per-mile premiums (Litman 1997; Bordoff and Noel 2008). Optional odometer-based PAYD would probably attract 20-40% of total policies, representing a significant portion of motorists who expect to drive less than 80% of average annual mileage in their rate class, representing 10-20% of total mileage, and GPS-based pricing would probably attract 2-4% of motorists, representing 1-2% of total mileage, due to its significantly higher financial costs and privacy concerns. These portions should increase over time as fixed-rate premiums increase, since they will lose the cross-subsidy from lower-annual-mileage motorists, eventually causing the market to shift to PAYD pricing, although this would probably take a decade or so.
Taken from:
http://www.vtpi.org/tdm/tdm79.htm
There is hardly a more important topic in urban planning than that of public space. A plaza, park, or other open space can be the difference between a neighborhood’s feeling like a paradise or a warzone. Does the public space in your area bring up any of the following descriptor’s? 
Urban infill is tricky. Remaining true to the contextual forms of the subject property while delivering a unique, differentiating project sometimes seem to be an impossibility. 
