2007 TRAFFIC SIGNAL SELF-2007 TRAFFIC SIGNAL SELF-ASSESSMENTASSESSMENT

WebcastWebcast

December 13December 13th,th, 2006 2006

Woody HoodWoody HoodMaryland State Highway AdministrationMaryland State Highway Administration

Purpose of the RevisionsPurpose of the Revisions

Revise and update based on comments Revise and update based on comments received on the initial versionreceived on the initial version

Results that provide for comparison with results Results that provide for comparison with results from the previous versionfrom the previous version

Continue to be released every two yearsContinue to be released every two years

Respondents can share results with regional Respondents can share results with regional FHWA officeFHWA office

What’s different in the 2007 What’s different in the 2007 Assessment?Assessment?

22ndnd version focuses on processes and version focuses on processes and outcomesoutcomesQuestions and benchmarks have been Questions and benchmarks have been refinedrefinedLayout of the topic areas revisedLayout of the topic areas revisedSome questions eliminated, and new Some questions eliminated, and new questions addedquestions addedAbility to “opt out” of questions that may Ability to “opt out” of questions that may not apply to your jurisdictionnot apply to your jurisdiction

2004 Self Assessment2004 Self Assessment

ManagementManagementSignal Operation in Coordinated SystemsSignal Operation in Coordinated SystemsSignal Operation at Individual Signal Operation at Individual IntersectionsIntersectionsSpecialized Operation for Traffic SignalsSpecialized Operation for Traffic SignalsDetection SystemsDetection SystemsMaintenanceMaintenance

2007 Self Assessment2007 Self Assessment

ManagementManagementSignal Operation at Individual Signal Operation at Individual IntersectionsIntersectionsSignal Operation in Coordinated SystemsSignal Operation in Coordinated SystemsSignal Timing PracticesSignal Timing PracticesTraffic Monitoring and Data CollectionTraffic Monitoring and Data CollectionMaintenanceMaintenance

Principal ChangesPrincipal ChangesProcess and outcome orientedProcess and outcome oriented

New/revised SectionsNew/revised Sections

New questions – eliminated questionsNew questions – eliminated questions

Redefined benchmarksRedefined benchmarks

Eliminated any perceived comparison between central based and Eliminated any perceived comparison between central based and closed-loop systemsclosed-loop systems

Ability to opt-out of questions that may not applyAbility to opt-out of questions that may not apply

ExamplesExamples

Process/Outcome OrientedProcess/Outcome Oriented

2004 Assessment Question 412004 Assessment Question 41

Does your agency commit resources in Does your agency commit resources in alignment with industry guidelines for alignment with industry guidelines for signalized intersection maintenance?signalized intersection maintenance?

Benchmarks were based on the ratio of Benchmarks were based on the ratio of traffic signals to traffic signal technicianstraffic signals to traffic signal technicians

2007 Assessment Question 2007 Assessment Question

Does your agency have established policies and Does your agency have established policies and processes and commit resources to provide processes and commit resources to provide timely response after a critical malfunction is timely response after a critical malfunction is identified?identified?

Benchmarks are based on response times of Benchmarks are based on response times of technicians to the intersectiontechnicians to the intersection

Actual response time more important Actual response time more important

Redefined BenchmarksRedefined Benchmarks

For a 5 score, your agency……..For a 5 score, your agency……..

Benchmarks were redefined on a 1 to 5 scale, Benchmarks were redefined on a 1 to 5 scale, with more clearly defined expectations and with more clearly defined expectations and outcomes for each scoreoutcomes for each score

Ability to opt-outAbility to opt-out

Example: inter-jurisdictional signal coordination Example: inter-jurisdictional signal coordination

2004 Assessment 2004 Assessment

Question 18Question 18

Do you coordinate signal timings across Do you coordinate signal timings across jurisdictional boundaries in support of jurisdictional boundaries in support of freeway and corridor operations?freeway and corridor operations?

Benchmarks are not process or outcome Benchmarks are not process or outcome orientedoriented

2007 Assessment2007 AssessmentQuestion 10Question 10

Does your agency have a cross-jurisdictional Does your agency have a cross-jurisdictional and/or regional agreement regarding signal and/or regional agreement regarding signal coordination and operations?coordination and operations?

Benchmarks on 1 to 5 scale, and are based on Benchmarks on 1 to 5 scale, and are based on processes, and the level at which you do certain processes, and the level at which you do certain thingsthings

N/AN/A

Signal Timing PracticesSignal Timing PracticesSignal coordination, is comparative analysis of Signal coordination, is comparative analysis of various cycle-offset-split combinations, and various cycle-offset-split combinations, and phase sequences evaluated?phase sequences evaluated?

Time-Space Diagrams, alternate phase Time-Space Diagrams, alternate phase sequences evaluated?sequences evaluated?

Operation during periods of light traffic flow, Operation during periods of light traffic flow, what operational modes are considered?what operational modes are considered?

Queue spillback, mitigating measures?Queue spillback, mitigating measures?

Central Based vs Closed LoopCentral Based vs Closed Loop

Real-time, many interpreted this to mean central Real-time, many interpreted this to mean central basedbased

2007 Assessment specifically mentions central 2007 Assessment specifically mentions central based and/or closed loop operationbased and/or closed loop operation

No distinction is made between the twoNo distinction is made between the two

Focus more on whether or not capabilities are Focus more on whether or not capabilities are being usedbeing used

SummarySummary

Process/outcome orientedProcess/outcome oriented

Maintain comparison with initial versionMaintain comparison with initial version

Clarify questions and benchmarksClarify questions and benchmarks