1. Commercial Double Parking on a Congested Street Implications for Transit Operations in San Francisco Kristen Carnarius Graduate Student, UC Berkeley June 25, 2012

2. Source: Artico2 using a Creative Commons license

3.  But, buses are slow  Average speed, local bus is 6 mph  Average speed, limited bus is 10 mph

4. Experiment Design

5. Summary Statistics  Variable of interest = Speed  Each observation is speed over 4 blocks  N = 473  N (limited) = 139  N (local) = 334  DP = # blocks double parked vehicles >=1

6. Speed (mph) Density DP variable 0 1 2 3 Distribution of Speed – Local Buses

7. Speed (mph) Density DP variable 0 1 2 3 Distribution of Speed – Local Buses

8. Speed (mph) Density DP variable 0 1 2 3 Distribution of Speed – Local Buses

9. Model Formula constant + beta1*(number of blocks double parking >= 1) + beta2*(limited bus or local bus) + beta3*(GPS point location in First Block) + beta4*(GPS point location in Last Block) + beta5*(occurrence of construction) Speed =

10. Model Formula constant + beta1*(number of blocks double parking >= 1) + beta2* (limited bus or local bus) + beta3* (GPS point location in First Block) + beta4* (GPS point location in Last Block) + beta5* (occurrence of construction) Speed =

11. Model Results EstimateStd. Errorp value Constant6.580.15<2.2e-16*** Limited4.000.02<2.2e-16*** First Block-0.680.41-1.65 Last Block0.570.222.54* Construction-0.340.380.36 #Blocks with DP-0.170.042.2e-05*** *** <1% ** <5% * <10%

12. Model Results EstimateStd. Errorp value Constant6.580.15<2.2e-16*** Limited4.000.02<2.2e-16*** First Block-0.680.41-1.65 Last Block0.570.222.54* Construction-0.340.380.36 #Blocks with DP-0.170.042.2e-05*** *** <1% ** <5% * <10%

16. Conclusions  Reliability and safety  More nuanced approach needed  Recognition of complexity in bus travel

17. Double parking, tip of the travel time ice berg? Contact: Kristen Carnarius kcarnarius@gmail.com

18.  Mission Street Cross Section Source: SFMTA

19. Mission District, San Francisco  3 routes  14 Mission  14L Mission Limited  49 Van Ness  Combined Frequency  3 minutes  Daily Ridership  70,000 passengers* *includes peak period express bus riders Source: SFMTA