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Roadway Sign Evaluation

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

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  1. Roadway Sign Evaluation Presented by Keenline Innovation Technology & Training Inc

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. How Keenline reviews the retroreflectivity of signs • Roadvista 922 hand-held retroreflectometer. Keenline Innovation Technology & Training Inc.

  9. 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.

  10. 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.

  11. Questions? Keenline Innovation Technology & Training Inc.

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