CE990 Graduate Seminar Presentations

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The Development of a MunicipalThe Development of a Municipal--level level Strategic Highway Safety Plan: Strategic Highway Safety Plan:

A Case Study for the City of SaskatoonA Case Study for the City of Saskatoon

Mariniel Flores, M.Sc. Candidate, First Year

Supervisor: Dr. Peter Y. Park

February 3, 2012

• Introduction• Strategic Highway Safety Plan (SHSP)• Procedures in Developing a SHSP• Network Screening• Potential Issues• Research Data• Research Goal, Objectives and Benefits

OutlineOutline

• Saskatoon has experienced a 27% increase in total motor-vehicle collisions and a 30% increase in property-damage-only (PDO) collisions during the past ten years (2000-2009)

0

5,000

10,000

15,000

20,000

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2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

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f Col

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Total Motor-vehicle Collisions PDO Collisions

IntroductionIntroduction

(SGI, 2010)

• Injury and fatal collision trends are neither decreasing nor increasing significantly

IntroductionIntroduction

(SGI, 2010)

• Collision cost trend have increased by 83%• Many jurisdictions have limited amount of resources

to prevent collisions in different concerning areas

0

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20,000,000

30,000,000

40,000,000

50,000,000

60,000,000

70,000,000

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009

Col

lisio

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ost (

$)

Year

IntroductionIntroduction

(SGI, 2010)

Integrated Safety Management Integrated Safety Management Process (ISMP)Process (ISMP)

1.Review highway safety information2.Establish emphasis areas and goals3.Develop objectives, strategies and preliminary

action plans4.Determine the appropriate combination of

strategies5.Develop detailed action plans6.Implement and evaluate the performance of the

action plans

SHSP

• Scientific, data-driven, four to five year comprehensive safety plan that identifies emphasis areas and establishes target collision reduction goals

• Also known as Traffic Safety Action Plan, Strategic Highway Safety Program, etc.

• Can be evaluated and updated for future use• Requires various stakeholders’ coordinated and

active participation

Strategic Highway Safety Plan Strategic Highway Safety Plan (SHSP)(SHSP)

Types of SHSP• Federal-level SHSPs• Provincial-level SHSPs• Municipal-level SHSPs

Strategic Highway Safety Plan Strategic Highway Safety Plan (SHSP)(SHSP)

(CCMTA, 2011) (SGI, 2010)

(The City of Hamilton, 2009)

Federal-level SHSP• CCMTA’s Canada’s Road Safety Strategy 2015• Encourages each Canadian province to develop its

own emphasis areas• Includes a total of ten emphasis areas

Strategic Highway Safety Plan Strategic Highway Safety Plan (SHSP)(SHSP)

(CCMTA, 2011)

Provincial-level SHSP• SGI Traffic Safety Strategy 2011-2015• Seven emphasis areas

Strategic Highway Safety Plan Strategic Highway Safety Plan (SHSP)(SHSP)

(SGI, 2010)

Municipal-level SHSP• Hamilton Strategic Road Safety Program

Strategic Highway Safety Plan Strategic Highway Safety Plan (SHSP)(SHSP)

(The City of Hamilton, 2009)

Municipal-level SHSP• Hamilton Strategic Road Safety Program

Strategic Highway Safety Plan Strategic Highway Safety Plan (SHSP)(SHSP)

(The City of Hamilton, 2009)

Selection of Emphasis Areas• Descriptive data analysis• Communication between stakeholders

Procedures in Developing a SHSPProcedures in Developing a SHSP

(State of Arizona, 2007)

Setting target goals for each chosen emphasis area• Basic-level collision data analysis• Communication among stakeholders

30%40%40%20%20%40%20%20%30%

Procedures in Developing a SHSPProcedures in Developing a SHSP

(Broughton and Knowles, 2010) (CCMTA, 2004)

• In addition, network screening will be conducted to determine hotspots for each chosen emphasis area

• Using Beta-binomial (BB) test method• BB Distribution

• BB Probability

i = 1,2,3,…,SS = all reference locationsNai = target collision configurationNti = total collisionsα,β = beta parameters

Pi = Bernoulli probability (proportion at a target location)Pcr = established threshold proportion

Network ScreeningNetwork Screening

(Kononov and Janson, 2002)

(Kononov and Janson, 2002)

Network ScreeningNetwork Screening

(Sahaji et al., 2011)

• Nature of the collision data• Availability, reliability and quality• Challenges associated with the City of

Saskatoon’s GIS street map database• Communication among stakeholders• Difficult to include all the stakeholders• Certain stakeholders often state their opinions

and are more active than other stakeholders

Potential IssuesPotential Issues

• SGI collision databases (collision, vehicle and occupant)

• City of Saskatoon street map with geographically-referenced streets and intersections

Research DataResearch Data

• The research goal will be to develop a municipal-level SHSP to assist in the efficient allocation of limited resources to improve road safety

Research GoalResearch Goal

• Investigation of methods to identify emphasis areas• Investigation of the methods to determine the

target collision reduction goal(s) for each chosen emphasis area

• Investigation of network screening methods for each chosen emphasis area

• Conduct a case study of developing a SHSP for the City of Saskatoon based on the chosen methods

ObjectivesObjectives

• Combined efforts of the stakeholders will reduce the total amount of expenditures towards road safety improvement programs

• Development of target collision reduction goals will allow for monitoring and evaluating of the overall performance of road safety improvement projects

• Visualization of locations of safety concern for each emphasis area can be used to quickly identify high collision locations

• Economic, environmental and social benefits

BenefitsBenefits

• Dr. Peter Park• City of Saskatoon• Department of Civil & Geological Engineering

AcknowledgementsAcknowledgements

Thank You For Your Time