Enhanced Signing

Image Source: Google Earth

DEFINITION AND DESCRIPTION

Improving the quality and conspicuity of signs provides earlier warnings to motorists as they approach locations that may present increased risk (e.g., intersections, horizontal curves).

• Horizontal alignment warning signs (e.g. curve, turn, chevron, large arrow signs)
• Supplemental warning plaques
• Advance intersection warning signs
• Vehicle speed feedback signs
• Vertical retroreflective strips on sign supports
• Dual-mounting signs
• Increasing size of signs
• Supplemental beacons
• LEDs in sign border
• Temporary flags mounted above signs

Implementation Categories

CONSIDERATIONS

• Signs must be MUTCD-compliant.
• LEDs may be used in the borders and legends of warning signs (See MUTCD Section 2A.12).
• For placement and spacing information see Chapter 2C in the MUTCD.
• Use enhancements sparingly to avoid desensitizing drivers.

APPLICATION

• Use in locations where crash data, traffic volumes, and roadway characteristics (e.g., curvature, sight distance, lane width) indicate increased motorist awareness is needed.

example

Image Source: MUTCD 11^th Edition

Complimentary Countermeasures

• Speed Reduction Markings
• Rectangular Rapid Flashing Beacon
• Speed Feedback
• Changeable Message Signs