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Evaluation of enhanced traffic control devices at highway-railroad grade crossings.

Title:Evaluation of enhanced traffic control devices at highway-railroad grade crossings.
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Subject:Warning signs
Subject:Transportation -- Planning
Subject:Traffic signals
Subject:Traffic signs and signals
Subject:Regulatory signs
Subject:Railroad trains
Subject:Railroad tracks
Subject:Railroad grade crossings
Subject:Measures of effectiveness
Subject:Grade crossing protection systems
Subject:Warning Signs/ Warning Signals
Subject:Traffic Control Signals
Subject:Signs/ Signals
Subject:Sign Design
Subject:Safety measures
Subject:Regulatory Traffic Control Devices
Subject:Railways/ Railroad Tracks
Subject:Railway Crossings
Subject:Rail Vehicles
Subject:Post-Mounted Signs/ Post-Mounted Signals
Subject:Crossing Signals
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