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26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Christopher M. MonsereResearch Assistant ProfessorDept of Civil and Environmental EngineeringPortland State University
Sirisha Kothuri, Kristin Tufte, Robert L. Bertini,
School of Urban & Public AffairsPortland State University
Enhancing Targeted Traffic Enforcement Efforts in Portland, Oregon
Max Thorn Coffman and Christopher M. Monsere
School of Urban Studies and Planning andDepartment of Civil & Environmental Engineering
Intelligent Transportation Systems LaboratoryPortland State University
ITE District 6June 26, 2006
Honolulu, Hawaii
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Outline• Background
• Project motivation
• Methodology
• Preliminary results
• Next steps
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Background• Strong community support for traffic safety• 2002 - Safe Communities Coalition formed
with grant from Oregon DOT• July 2003 - Portland City Council approved
the Portland Traffic Safety Coordination Council
• November 2003 - Community and School Traffic Safety Account created– Source: Annual increase in traffic fines
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Community and School Traffic Safety Partnership
• Community-based, coalition-led effort to improve Portland's traffic safety
• Three focus areas– Bicycle and Pedestrian Safety– Safe Routes to School– Reducing Driver Error
• Strategic and Focused Enforcement
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Distribution of Program ResourcesTotal ~$2.5 million
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Current Enforcement Toolbox• Regular Traffic Division enforcement
• 10 officers
• Automated enforcement– Red light running cameras
• 6 cameras
– Photo radar• 4 vans
• Strategic and Focused Enforcement (SAFE)– Identified high crash intersections and corridors– Target missions and automated enforcement to
high risk areas
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Map: PDOT
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Project Objectives• Research new ways to identify SAFE
corridors– Use new GIS crash data– Try alternate network screening techniques
• Identify state-of-practice approaches
• Benefits– Allocate scarce staff and resources– Judges - maps as supporting evidence
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Methodology• In GIS, attribute crashes to segments
– average 400 feet (short!)
• Compare crash performance– across similar street types– note: traffic volume data not available yet
• Identify segments “above average”
• Add “driver error analysis”
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Normalizing for Street Class
Minor street
Other arterial
Primary arterial
Secondary arterial
Crashes per mile per year
(zero values excluded)
2.08
11.31
15.79
27.02
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Driver Error Analysis
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Techniques for identifying corridors
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
0
1 0 0
2 0 0
3 0 0
4 0 0
5 0 0
6 0 0
7 0 0
8 0 0
0 5 , 0 0 0 1 0 , 0 0 0 1 5 , 0 0 0 2 0 , 0 0 0 2 5 , 0 0 0 3 0 , 0 0 0
D i s t a n c e A l o n g S a n d y ( f e e t )
Cumulative Number of Crashes
Cumulative Plot of Crash Rate per Mile per Year for Sandy Blvd
NE 39th Ave
NE 52nd Ave
Distance (feet)
Num
ber
of C
rash
es
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
- 1 0 0
- 8 0
- 6 0
- 4 0
- 2 0
0
2 0
4 0
6 0
8 0
1 0 0
0 5 , 0 0 0 1 0 , 0 0 0 1 5 , 0 0 0 2 0 , 0 0 0 2 5 , 0 0 0 3 0 , 0 0 0
D i s t a n c e A l o n g S a n d y ( f e e t )
N (x,d) - r0*d
NE 39th Ave
NE 52nd Ave
Oblique Plot of Crash Rate per Mile per Year for Sandy Blvd
Distance (feet)
Num
ber
of C
rash
es
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Enforcement Enhancements
• High profile missions
• Corridor branding and signage
• Increased fine zones
• PDA ticketing
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Photos courtesy of Sharon White
City Commissioner Sam Adams participates in a crosswalk enforcement mission with media coverage.
High Profile Missions
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Branding, Signage and Increased Fines
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Next steps
• Incorporate traffic volume data
• Consider other screening approaches
• Use new PDA ticketing data
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
PDA Ticketing
• Saves time
• Reduces error
• Archives data
automatically
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Conclusions• Efforts may improve corridor selection
– add in traffic volumes– consider intersections separately– additional screening techniques
• Further research on “Safety Corridors”– Branding and Signage– Increased Fines
• Work with PPB to use new data sources– PDA ticketing
26 June 2006Institute of Transportation Engineers District 6 Annual Meeting
Intelligent Transportation Systems Lab
Acknowledgements• City of Portland
– Mark Lear– Greg Raisman– Sharon White
• Portland Police Bureau, Traffic Division– Comm. Bill Sinnott– Lt. Mark Kruger– Officer Michael Clary
• PSU ITS Lab– Peter Bosa– Aaron Breakstone Questions?