Commercial Double Parking on a Congested Street Implications for Transit Operations in San Francisco...
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Commercial Double Parking on a Congested Street Implications for Transit Operations in San Francisco Kristen Carnarius Graduate Student, UC Berkeley June 25, 2012
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Transcript of Commercial Double Parking on a Congested Street Implications for Transit Operations in San Francisco...
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)
Densi
ty
DP variable
0
12
3
Distribution of Speed – Local Buses
Speed (mph)
Densi
ty
DP variable
0
12
3
Distribution of Speed – Local Buses
Speed (mph)
Densi
ty
DP variable
0
12
3
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
Estimate
Std. Error p value
Constant 6.58 0.15 <2.2e-16 ***
Limited 4.00 0.02 <2.2e-16 ***
First Block -0.68 0.41 -1.65
Last Block 0.57 0.22 2.54 *
Construction -0.34 0.38 0.36
#Blocks with DP
-0.17 0.04 2.2e-05 ***
*** <1% ** <5% * <10%
Model Results
Estimate
Std. Error p value
Constant 6.58 0.15 <2.2e-16 ***
Limited 4.00 0.02 <2.2e-16 ***
First Block -0.68 0.41 -1.65
Last Block 0.57 0.22 2.54 *
Construction -0.34 0.38 0.36
#Blocks with DP
-0.17 0.04 2.2e-05 ***
*** <1% ** <5% * <10%
Conclusions
Reliability and safety
More nuanced approach needed
Recognition of complexity in bus travel
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
49
Source: SFMTA
