traffic control devices pooled fund study june 2010 technical liaisons: amanda emo (fhwa) bryan katz...
TRANSCRIPT
Traffic Control Devices Pooled Fund Study
June 2010
Technical Liaisons:Amanda Emo (FHWA)
Bryan Katz (SAIC)
Co-Chairs:Scott Wainwright (FHWA) Bill Lambert (NH DOT)
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TCD PFS Members
• FHWA Office of OperationsOffice of SafetyEastern Federal
Lands
• Local DOTsLos Angeles DOTBroward County DOT
• OrganizationsAmerican Traffic Safety Services Association (ATSSA)
• State DOTsCalifornia DOTFlorida DOTGeorgia DOTIowa DOTIllinois DOTKansas DOTMississippi DOTMissouri DOTNebraska DOT
New Hampshire DOTNew Jersey DOTNevada DOTNew York DOTNorth Carolina DOTOregon DOTPennsylvania DOTSouth Carolina DOTTexas DOTWisconsin 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 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 HeadsCompleted 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:• 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(202) [email protected]
Bill Lambert(603) [email protected]