Traffic Control Devices Consortium Pooled Fund Study

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Traffic Control Devices Consortium Pooled Fund
Study

• Co-Chairs
• Scott Wainwright (FHWA) Scott Thorson (Nevada
  DOT)

Technical Liaisons Thomas Granda (FHWA) Bryan
Katz (SAIC)
June 2007
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TCD PFS Members

• FHWA
• Office of Operations
• Office of Safety
• Eastern Federal Lands
• Local DOTs
• Los Angeles DOT
• Broward County DOT
• OrganizationsAmerican Traffic Safety Services
  Association (ATSSA)

• State DOTs
• California DOT
• Florida DOT
• Georgia DOT
• Iowa DOT
• Illinois DOT
• Kansas DOT
• Mississippi DOT
• Missouri DOT
• Nebraska DOT

New Hampshire DOT New Jersey DOT Nevada DOT New
York DOT North Carolina DOT Pennsylvania
DOT South Carolina DOT Texas DOT Wisconsin DOT

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Completed Projects

• Pavement Markings for Speed Reduction
• Colors for Transponder-Controlled Tollbooth Lanes
• Navigation Signing for Roundabouts
• Pedestrian Countdown vs. Flashing Dont Walk

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Current Projects

• Evaluation of Selected Symbol Signs (To be
  completed Summer 2007)
• Stutter Flash for Flashing Beacons at
  Unsignalized Pedestrian Crossings
• (To be completed Fall 2007)
• Diagrammatic Freeway Guide Sign Design
• (To be completed Summer 2007)
• Lane Restriction Marking and Signing for
  Double-Lane Roundabouts
• (To be completed Summer 2007)
• Analysis of Enlarged Pedestrian Signal Heads
• (To be completed Summer 2007)
• Warning Sign Legends for Emergency Incidents
• (In contracting phase, to begin Summer 2007)

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Evaluation of Selected Symbol Signs

• Research Goals
• Evaluate a series of symbols to determine the
  best symbol for various information based on
  driver comprehension and legibility
• Research Tasks
• Review of Symbols Used
• Determine Alternatives
• Comprehension Test
• Conspicuity and Legibility Test
• Final Report
• Principal Investigators
• Bryan Katz and Gene Hawkins

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Evaluation of Selected Symbol SignsCandidate
Ferry Symbols
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Evaluation of Selected Symbol SignsMotorist
Information
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Evaluation of Selected Symbol SignsMotorcycle
Warning
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Evaluation of Selected Symbol SignsObject Marker
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Evaluation of Selected Symbol SignsAutomated
Enforcement
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Evaluation of Selected Symbol SignsCar Rental
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Evaluation of Selected Symbol SignsSchool Bus
Stop Ahead
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Evaluation of Selected Symbol SignsTruck
Electrification
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Evaluation of Selected Symbol SignsTruck Parking
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Evaluation of Selected Symbol SignsWireless
Internet Access
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Stutter Flash for Flashing Beacons at
Unsignalized Pedestrian Crossings

• Research Question
• Can the effectiveness of the overhead flashing
  beacon be enhanced by replacing the traditional
  slow flashing incandescent lamps with rapid
  flashing LED lamps?
• Research Team
• Texas Transportation Institute

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Diagrammatic Freeway Guide Sign Design

• Research Question
• Are enhanced diagrammatic freeway guide signs
  with wider arrows or signs with upward pointing
  arrows more effective than the standard MUTCD
  diagrammatic guide signs?
• Principal Investigator
• Gary Golembiewski

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Diagrammatic Freeway Guide Sign Design
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Lane Restriction Marking and Signing for
Double-Lane Roundabouts

• Research Question
• What are the differences in driver behavior and
  comprehension of standard versus fishhook-style
  roundabout signs and markings?
• Principal Investigators
• John Molino and Bryan Katz

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Lane Restriction Marking and Signing for
Double-Lane Roundabouts

• Lane Restriction Signing and Marking
• Double-lane roundabouts
• 5 Different Signing and Marking Schemes
• MUTCD Standard (with words)
• MUTCD Enhanced
• Fishhook Standard
• Fishhook Enhanced (with words)
• Destination Lane Restriction

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Analysis of Enlarged Pedestrian Signal Heads

• Research Question
• What are the factors and visual characteristics
  that must be considered when implementing
  enlarged pedestrian signal heads?
• Principal Investigator
• John Molino

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Future Projects (Not Finalized)

• Determination of standard formats for guide signs
• Combined Lane-Use and Destination Signing
• Centerline Rumble Strips
• Evaluation of International Symbols for US Use
• Evaluation of Longitudinal Channelizing Barricade
  Effectiveness

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Questions?

• For further information, contact
• Thomas Granda
• [phone]
• thomas.granda_at_fhwa.dot.gov

Bryan Katz [phone] bryan.katz_at_fhwa.dot.gov