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

Source: Artico2 using a Creative Commons license

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

Experiment Design

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

Speed (mph) Density DP variable Distribution of Speed – Local Buses

Speed (mph) Density DP variable Distribution of Speed – Local Buses

Speed (mph) Density DP variable Distribution of Speed – Local Buses

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 =

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 =

Model Results EstimateStd. Errorp value Constant <2.2e-16*** Limited <2.2e-16*** First Block Last Block * Construction #Blocks with DP e-05*** *** <1% ** <5% * <10%

Model Results EstimateStd. Errorp value Constant <2.2e-16*** Limited <2.2e-16*** First Block Last Block * Construction #Blocks with DP e-05*** *** <1% ** <5% * <10%

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

Double parking, tip of the travel time ice berg? Contact: Kristen Carnarius

 Mission Street Cross Section Source: SFMTA

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