HAWK EvaluationNE/SE 41st Ave & E Burnside St

Sirisha KothuriWilliam FarleyKimber MillerAaron Rieck

Civil & Environmental Engineering

Civil & Environmental Engineering

Outline

• Introduction• Area Characteristics• Data• Analysis• Conclusions• Recommendations• Acknowledgements

Civil & Environmental Engineering

Introduction• High Intensity Activated CrossWalK• Motivation – Portland Crashes (1985 – 2002)

– Increase in bicycle traffic – Commitment to walking and biking

Pedestrians Crashes

3% Injuries

29 % Fatalities

Civil & Environmental Engineering

Introduction – cont.• Crashes at non – signalized intersections– Bikes and Peds have trouble finding gaps– Motorists on major streets do not yield or stop

• Options to reduce crashes – Median refuge islands, painted crosswalks

• Low compliance rate

– Install traffic signal• Not warranted, higher delay, increase in emissions

– HAWK

Civil & Environmental Engineering

MUTCD & HAWK Locations• 2009 MUTCD– Includes information on ped hybrid beacon– Application, design and operation

• Installed locations– Portland, OR• 41st & Burnside• 18th & Sandy

– Tucson, AZ– Other cities (Washington DC, Salt Lake City )

Civil & Environmental Engineering

Study Area

Burnside St & 41st Ave

Civil & Environmental Engineering

Study Area

Current Portland Bicycle Map

Portland Bicycle Plan for 2030

E. Burnside St & 41st Ave

Civil & Environmental Engineering

Study Area - 41st Avenue

Civil & Environmental Engineering

Study Area - Burnside St

Civil & Environmental Engineering

Study AreaStudy Area – Intersection Diagram

Source: FHWA Experimentation #4-298(E) Modified HAWK Signal and Bike Signal - Draft Report

Civil & Environmental Engineering

HAWKWestbound Burnside

Eastbound Burnside

Civil & Environmental Engineering

HAWK Display

Flashing Yellow

Solid Yellow

Solid Red

Flashing Red

Civil & Environmental Engineering

Bike and Pedestrian DisplaysDon’t Walk

Walk

Flashing Don’t Walk

Civil & Environmental Engineering

Display Sequence

Source: FHWA Experimentation #4-298(E) Modified HAWK Signal and Bike Signal - Draft Report

Civil & Environmental Engineering

Data• Video data available for 4 days in May 2009

• Analyzed time periods– PM Peak (5 – 6 PM) on Thursday, 5/14/2009 – AM Peak (8 – 9 AM) on Friday, 5/15/2009

• Type of data gathered – Counts: Pedestrian & Bicyclist– Violations: Pedestrian, Bicyclist, & Motor vehicles– Delay: Pedestrian & Bicyclist

Civil & Environmental Engineering

Intersection via Video

Civil & Environmental Engineering

Analysis – Pedestrian & Bicycle Delay

• Delay data not collected from video because of camera angle

• HAWK activates as soon as button is pressed• Min time between activations – 30 sec• Observed and collected data in PM on

February 22, 2011 Avg Delay/Stopped Bike Avg Delay/Approach Bike

SB on 41st 20 sec 7.5 sec

NB on 41st 16.67 sec 12.5 sec

Civil & Environmental Engineering

Analysis – Pedestrian CountsMale Female Unknown

AM 3 17 4 PM 9 19 3

Civil & Environmental Engineering

Analysis – Pedestrian ViolationsTotal AM => 23Total PM => 24

Civil & Environmental Engineering

Analysis - Bicycle CountsMale Female Unknown

AM 24 9 11 PM 61 19 4

Civil & Environmental Engineering

Analysis – Bicycle ViolationsTotal AM => 44Total PM => 84

Civil & Environmental Engineering

Analysis – Vehicle Movement Violations Counts

Civil & Environmental Engineering

Analysis – Vehicle Violation SpecificsHAWK Activations

AM => 28PM => 41

Civil & Environmental Engineering

CrashesRear – End Fixed Head – On Side Swipe

Before Installation(Oct 2004 – Oct 2006)

2 1 0 0

After Installation(Nov 2006 – Nov 2008)

5 0 1 1

Direction of Change

Source: FHWA Experimentation #4-298(E) Modified HAWK Signal and Bike Signal -Draft Report

Source: FHWA “Safety Effectiveness of the HAWK Pedestrian Crossing Treatment”..

Civil & Environmental Engineering

Conclusions

• Primary objective of using the HAWK system• System usage at study location• Violations were observed for all modes • Crashes for the study location

Civil & Environmental Engineering

Recommendations• Improvements to the signal on Burnside• Improvements to the signal on 41st• Increased public education• Further research on crash patterns and

effectiveness

Civil & Environmental Engineering

Acknowledgements

• Bureau of Transportation, City of Portland• Dr. Ashley Haire, Portland State University• Mark Haines, PSU/City of Portland