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Roadway Sign Evaluation . Presented by Keenline Innovation Technology & Training Inc. Topics for Discussion. What is reviewed when evaluating a sign? What is retroreflection? Retroreflective standards for sign sheeting Current method for reviewing the retroreflectivity of signs

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roadway sign evaluation

Roadway Sign Evaluation

Presented by

Keenline Innovation Technology & Training Inc

topics for discussion
Topics for Discussion
  • What is reviewed when evaluating a sign?
  • What is retroreflection?
  • Retroreflective standards for sign sheeting
  • Current method for reviewing the retroreflectivity of signs
  • How Keenline reviews the retroreflectivity of signs
  • How Keenline can assist
  • Questions?

Keenline Innovation Technology & Training Inc.

what is reviewed when evaluating a sign
What is reviewed when evaluating a sign?
  • Location (intersection and Global Positioning System (GPS) co-ordinates)
  • Placement (height, setback, angle)
  • Condition of sign (deteriorating, bent, bullet holes, missing)
  • Condition of support (deteriorating, cracked, broken, missing)
  • Retroreflectivity ( 4 locations on every reflective surface, ratio between colours if applicable)
  • Text (lettering meets Ontario Traffic Manual (OTM) specifications)

Keenline Innovation Technology & Training Inc.

what is retroreflection
What is retroreflection?
  • Retroreflection occurs when light is reflected back in the same direction as the source of the light.
  • For the use of roadway signs imperfect retroreflection or retroreflection in a cone shape is required to allow the driver to see the light coming back from the sign.
  • Sign sheeting achieves this by the use of glass beads or prismatic material.

Keenline Innovation Technology & Training Inc.

retroreflective standards for sign sheeting
Retroreflective standards for sign sheeting
  • Minimum reflectance values have been set out for sign sheeting in ASTM Designation D 4956-07. Standard Specifications for Retroreflective Sheeting for Traffic Control. These specifications cover new and aged sign sheeting.
  • the MUTCD in the US adopted new minimum maintained retroreflective levels to be used on all roads open to public travel on January 22, 2008.
  • Keenline incorporated the MUTCD standards into the review of road signs as a best practise minimum.

Keenline Innovation Technology & Training Inc.

current methods for reviewing the retroreflectivity of signs
Current methods for reviewing the retroreflectivity of signs
  • Visual night inspection
          • OTM recommends :
              • Inspector be 50 years or older
              • Use low beam headlights
              • View from the distance that the sign can be read from and reacted to
  • Hand-held or vehicle-equipped sign retroreflectometer
          • Following specifications of ASTM Designation E 1709 – 08. Standard Test Method for Measurement of Retroreflective Signs Using a Portable Retroreflectometer at a 0.2 Degree Observation Angle

Keenline Innovation Technology & Training Inc.

signs reviewed using both methods
Signs Reviewed using both methods

Sign that failed

Distance 45m

Retroreflection of 7 cd

Sign that passed

Distance 45m

Retroreflection of 120 cd

Keenline Innovation Technology & Training Inc.

how keenline reviews the retroreflectivity of signs
How Keenline reviews the retroreflectivity of signs
  • Roadvista 922 hand-held retroreflectometer.

Keenline Innovation Technology & Training Inc.

how keenline reviews the retroreflectivity of signs9
How Keenline reviews the retroreflectivity of signs
  • All information gathered is recorded on a Sign Inspection sheet developed by Keenline that uses the guidelines set out in ASTM Designation E 1709 – 08. Standard Test Method for Measurement of Retroreflective Signs Using a Portable Retroreflectometer at a 0.2 Degree Observation Angle

Keenline Innovation Technology & Training Inc.

how keenline can assist
How Keenline can assist
  • Customized Inspection Sheets
  • Information gathered can be used to create a sign inventory and aid in the development of a sign maintenance budget/asset management
  • Development of a sign inspection program that will meet the proposed revisions to the Minimum Maintenance Standards for Municipal Highways
  • Random checking of sign stock
  • Review newly assumed subdivisions for compliant signs

Keenline Innovation Technology & Training Inc.

questions
Questions?

Keenline Innovation Technology & Training Inc.