Transcript Slide 1

Traffic Control Devices
Pooled Fund Study
Co-Chairs:
Scott Wainwright (FHWA)
Bill Lambert (NH DOT)
June 2010
Technical Liaisons:
Amanda Emo (FHWA)
Bryan Katz (SAIC)
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
Oregon 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
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Pedestrian Countdown vs. Flashing Don’t Walk
Evaluation of Selected Symbol Signs
Diagrammatic Freeway Guide Sign Design
Lane Restriction Marking and Signing for Double-Lane Roundabouts
Alternative Flashing Patterns for Beacons at Unsignalized Pedestrian
Crossings
• Analysis of Enlarged Pedestrian Signal Heads
Completed Since Last June Meeting:
• Combined Lane Use and Destination Signs
• State-of-Practice for Freeway Guide Sign Design
• Evaluation of International Symbol Sign Designs
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Combined Lane Use and
Destination Signs
Purpose
• Provide recommendations for a consistent and uniform practice for
combining lane use information on guide signs including
construction/assembly type, type of information conveyed, and color
of arrows and arrow panels.
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Combined Lane Use and
Destination Signs
Results
• Signs with single lane designations were understood
significantly more than signs with shared-lane
designations
• Regulatory lane-use panels and lane-use arrows proved to
be equally effective for combined lane use and destination
signs
• No difference in comprehension based on the presence or
absence of vertical separator lines for signs tested
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State-of-Practice for
Freeway Guide Sign Design
Purpose
• Review current practices and
provide an example uniform
methodology to create a guide
sign of any configuration by
knowing the desired uppercase
letter height of the principal
legend.
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State-of-Practice for
Freeway Guide Sign Design
Report Contains Information About:
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Fractions
Letter Style
Legend Height
Numeral Height
Word Spacing
Line Spacing
Edge Spacing
Route Shield Size
Corner Radius
Border Width
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State-of-Practice for
Freeway Guide Sign Design
Most Common Practice:
• Border Thickness
• Corner Radius
• Element Ratio to
Capital Letter Height
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Evaluation of International
(and Selected) Symbol Signs
Purpose
• Evaluate potential symbol signs for legibility and comprehension.
Signs include concepts from international practice as well as others
that are used in the US but not included in the MUTCD.
– Combination Horizontal Alignment /
Advisory Speed
– Congestion Ahead
– Do Not Enter
– Do Not Pass
– Electric Vehicle Charging Station
– Fallen Rocks
– Flagger Ahead
– Maximum Width
– No Left Turn Ahead
– Railroad Crossing on Leg of Roundabout
– Cross Street Preferential Lane
Warning Signs
– Road Narrows
– Low Shoulder Warning Signs
– Survey Crew
– Trolley Crossing
– Uneven Lanes
– Winery
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Evaluation of International
(and Selected) Symbol Signs
Results
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Evaluation of International
(and Selected) Symbol Signs
Results
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Evaluation of International
(and Selected) Symbol Signs
Results
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Evaluation of International
(and Selected) Symbol Signs
Results
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Current and Near-Term Project Topics
• Truncated Arrow-per-Lane Guide Signs
• Evaluation of Additional Symbol Signs
• Pedestrian Countdown Signals without
Flashing Hand
• Business Logo Signing
• Sign Images as Pavement Markings
• Incident Management Signs
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Questions?
For further information, contact:
Scott Wainwright
Bill Lambert
(202) 366-0857
(603) 271-2291
[email protected]
[email protected]
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