Traffic Control Device Demonstration

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Traffic Control DeviceDemonstrationJune 15, 2005
Summary Report
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Conducted at the 3M Transportation Safety Center
in Cottage Grove, MinnesotaSponsored by Mn/DOT
and Northland ATSSA
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(No Transcript)
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Autoflaggernot part of the survey
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No PassingSign

• Daytime top half
• Brightness 98
• Legibility 93
• Nighttime top half
• Brightness 94
• Legibility 90

DG3
VIP
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Glyph TrailSign

• Font
• Top is easiest to read
• Bottom is easiest to read
• Sheeting
• Right side is brighter
• Right side is clearer

DG3
VIP
CLEARVIEW on Bottom
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OXOXOXSign

• Typical Comments
• Looks uniform across NO Difference
• Different shades of green?
• Left side is brighter?
• Center is brighter?
• Didnt look like the sign was level

Orientation
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FidgetySign

• Daytime
• Left 64
• Middle 36
• Daytime
• Middle 38
• Right 62

DG3
DG3
VIP
CLEARVIEW
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FidgetySign

• Nighttime
• Left 15
• Middle 85
• Nighttime
• Middle 20
• Right 80

DG3
DG3
VIP
CLEARVIEW
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ConspicuitySigns

• Daytime
• Left 66
• Middle 4
• Right 30

LEDs
Border
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ConspicuitySigns

• Nighttime
• Left 86
• Middle 5
• Right 9

LEDs
Border
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LegibilitySigns

• Daytime
• Left 92
• Middle 5
• Right 3

CLEARVIEW
CLEARVIEW
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LegibilitySigns
CLEARVIEW
CLEARVIEW

• Nighttime
• Left 59
• Middle 5
• Right 36

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STOPSigns

• Daytime
• Brightness
• Left 61
• Right 39
• Legibility
• Left 63
• Right 37

DG3
VIP
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STOPSigns

• Nighttime
• Brightness
• Left 96
• Right 4
• Legibility
• Left 86
• Right 14

DG3
VIP
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Wet ReflectivePavement Markings

• Typical Nighttime Comments
• Awesome
• Non-wet tape looks black
• Obviously superior
• Both white and yellow

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TypicalLane Closure

• Typical Comments
• Drums demand respect
• Looks like a solid wall
• Hard to tell lanes are mergingat barrels
• Visible / Clean - not confusing
• Very visible, good alignment
• Type III with arrow was critical for direction

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Night Maint.Lane Closure

• Typical Comments
• 2 arrow boards command respect
• Cones look like a gap in the closure
• Looks cluttered
• Direction barricades easier to follow than
  barrels
• Much better at night than during the day

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VariousDisplays
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Conclusions Actions Taken

• DG3 Tech Memo For permanent and temporary WZ
  signs
• Clearview Fonts
• Concluded to stay with current fonts
• Nighttime Maintenance LaneClosure TapersMN
  MUTCD is being reviewed to allow the practice

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Questions?