blue light special: improving bicycle infrastructure …...blue light special: improving bicycle...
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Blue Light Special:
Improving Bicycle
Infrastructure with
Active Feedback DevicesLisa Okimoto, EI
Portland Bureau of Transportation
Signals and Street Lighting
Portland, Oregon: Most Bicycle-Friendly
City in the U.S.A.
What is an active feedback device?
“You are being detected!”
Current Infrastructure and Detection
9C-7 Bicycle Stencil
R10-22 Bicycle Sign
Why is this important?
Study at SW Sheridan Avenue and SW
Moody StreetPortland, Oregon
Aerial view of SW Moody
Avenue and SW Sheridan
Street
• Existing bicycle-only signal.
• Existing inductive loop and 9C-7
bicycle stencil.
• Existing bicycle push button.
Blue Light at SW Moody Avenue and SW
Sheridan Street
Video Data Collection
Video Data Analysis for SW
Moody Avenue and SW Sheridan
Street
• June 12, 2014
• After sandwich board sign installation.
Video Data Analysis: Results
Observation TypeBefore Blue
Light Installation
Percentage of
Behavior
Observations
After Blue
Light Installation
Percentage of
Behavior
Observations
After Blue Light
Informational Sign
Installation
Percentage of
Behavior
Observations
Total Count of NB
People on Bikes694 - 658 - 454 -
Total Number of
Behavior Observations369 - 332 - 260 -
User Pushes Button
Only and Wait Next to
Button
251 68% 200 60% 107 41%
User Pushes Button and
Moves to Stencil13 4% 17 5% 13 5%
User Waits on Stencil
Only54 15% 68 20% 127 49%
Number of People who
Did Not Comply with
Bike Signal (Ran Red
Light)
51 13.8% 47 14.2% 37 14.2%
Number of People who
Did Not Comply with
Bike Signal (Ran Red
Light), out of total NB
cyclists
51 7.3% 47 7.1% 37 8.1%
Video Data Analysis: Caveats
Observation TypeBefore Blue
Light Installation
Percentage of
Behavior
Observations
After Blue
Light Installation
Percentage of
Behavior
Observations
After Blue Light
Informational Sign
Installation
Percentage of
Behavior
Observations
Total Count of NB
People on Bikes694 - 658 - 454 -
Total Number of
Behavior Observations369 - 332 - 260 -
User Pushes Button
Only and Wait Next to
Button
251 68% 200 60% 107 41%
User Pushes Button and
Moves to Stencil13 4% 17 5% 13 5%
User Waits on Stencil
Only54 15% 68 20% 127 49%
Number of People who
Did Not Comply with
Bike Signal (Ran Red
Light)
51 13.8% 47 14.2% 37 14.2%
Number of People who
Did Not Comply with
Bike Signal (Ran Red
Light), out of total NB
cyclists
51 7.3% 47 7.1% 37 8.1%
Aerial view of SW Moody Avenue
and SW Sheridan Street
• Inductive loop and bicycle stencil located
right next to bicycle push button.
Further Testing: Additional StudiesMore Blue Light Devices
The “WAIT” Signal
SE Division Street and SE 21st
Avenue
• Existing bicycle lane and bicycle box.
• Existing inductive loop and 9C-7 bicycle
stencil.
NE Martin Luther King Jr.
Boulevard and NE Tillamook
Street
• Existing bicycle lane and bicycle box.
• Existing inductive loop and 9C-7 bicycle
stencil.
• Cyclist’s call for a green light has been
made successfully.
• Temporal feedback; time until green
shown as illuminated ticks.
The “WAIT” Signal
W A C H TW A C H T
Thank you!“Life is like riding a bicycle – in order to keep your balance, you must
keep moving.”
- Albert Einstein
References
"One fine day," cycling in Portland, Oregon. Dir. Ryan Coussens. 2012. YouTube.
Boudart, Jesse, et al. "An Assessment of Bicyclist Behavior at Traffic Signals with a Detector Confirmation Feedback Device." Transportation Research Board (2015): 13.
Koonce, Peter. Bicycle Countdown Signal - Time to Green. 10 July 2011. <http://koonceportland.blogspot.com/2011/07/bicycle-countdown-signal-time-to-green.html>.
Portland Bureau of Transportation. Bicycles in Portland Fact Sheet. 2015. <http://www.portlandoregon.gov/transportation/article/407660>.
Traffic Signal Fails to Detect Bicycle, 3/21/2011; Tried Ped Xing. Dir. pdxcommuter. 2011. YouTube.