Transcript Slide 1

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
TCD PFS Members
• State DOTs
California DOT
Florida DOT
Georgia DOT
Iowa DOT
Illinois DOT
Kansas DOT
Mississippi DOT
Missouri DOT
Nebraska DOT
• FHWA
New Hampshire DOT
New Jersey DOT
Nevada DOT
New York DOT
North Carolina DOT
Pennsylvania DOT
South Carolina DOT
Texas DOT
Wisconsin DOT
Office of Operations
Office of Safety
Eastern Federal Lands
• Local DOTs
Los Angeles DOT
Broward County DOT
• Organizations
American Traffic Safety
Services Association
(ATSSA)
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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 Don’t 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:
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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 Signs:
Candidate Ferry Symbols
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Evaluation of Selected Symbol Signs:
Motorist Information
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Evaluation of Selected Symbol Signs:
Motorcycle Warning
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Evaluation of Selected Symbol Signs:
Object Marker
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Evaluation of Selected Symbol Signs:
Automated Enforcement
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Evaluation of Selected Symbol Signs:
Car Rental
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Evaluation of Selected Symbol Signs:
School Bus Stop Ahead
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Evaluation of Selected Symbol Signs:
Truck Electrification
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Evaluation of Selected Symbol Signs:
Truck Parking
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Evaluation of Selected Symbol Signs:
Wireless 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 DoubleLane Roundabouts
Research Question
• What are the differences
in driver behavior and
comprehension of
standard versus fishhookstyle roundabout signs
and markings?
Principal Investigators
John Molino and Bryan Katz
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Lane Restriction Marking and Signing for DoubleLane 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
Bryan Katz
(202) 493-3365
(202) 493-3388
[email protected]
[email protected]
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