Transportation Demand Management
Elizabeth Hughes
President and Senior Transportation Planner
Transportation Demand Management Elizabeth Hughes President and - - PowerPoint PPT Presentation
Transportation Demand Management Elizabeth Hughes President and Senior Transportation Planner What is it? TDM Overview What is Transportation Demand Management (TDM)? Transportation Systems Management (TSM) Vehicle Trip
President and Senior Transportation Planner
“Losses or punishments had a measured impact two to three times greater than gains or rewards.”1 “There are no carrots for other modes that can overcome the powerful determinism of free employer car parking.”2 Carpool example:
1) https://source.wustl.edu/2015/05/carrot-or-stick-punishments-may-guide-behavior-more-effectively-than-rewards/
2) Commuter Mode Choice and Free Car Parking, Public Transportation Benefits, Showers/Lockers, and Bike Parking at Work: Evidence from
the Washington DC Region, Andrea Hamre and Ralph Buehler, Virginia Tech, Journal of Public Transportation, Vol. 17, No. 2, 2014.
Year Rigel Amgen Calico Britannia Oyster Point I (Aggregate Data) 2004** 14.4% 20.0% 17.60% 2005** 36.3% 23.8% 25.70% 2006** 50.6% 21.7% 28.90% 2007** 49.0% 24.6% 31.15% 2008** 52.6% 30.7% 37.07% 2009** 33.7% 30.3% 31.20% 2010 30.2% 25.7% 26.74% 2011 30.2% 26.0% 26.50% 2012 28.0% 43.8% 38.73% 2013 28.9% 40.9% 37.98% 2014 31.2% 35.0% 34.16% 2015*** 25.9% 48.6% 20.7% 38.70%
Notes: *All alternative mode-use rates are calculated assuming traditional non-respondents as SOV. ** Carpool data may have included "carpool with children" and commuter carpool results may have been overstated.
South San Francisco TDM Ordinance-stipulated Survey Methodology Alternative Transportation Mode-Use Rate*
*** Due to low response rate, Amgen data was adjusted according to the City's 2010 revised Zoning Ordinance and the campus mode-use rate reflects a hybrid rate.
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President Senior Transportation Planner 408-420-2411 (Direct) Elizabeth.Hughes@tdmspecialists.com