INDOT Sign

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INDOTSign Paint QA ProceduresSeptember 23,
20082nd MQA Peer ExchangeDurham, North Carolina
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Overview

• Paint QA Procedures
• Summary of Paint QA Results
• Sign QA Procedures
• Summary of Sign QA Results
• Paint Sign QA Costs
• Conclusion

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Paint QA Procedures
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Paint QA History Background

• Almost all striping is done by INDOT employees.
• Paint Quality Assurance Procedures were first
  developed in 1999.
• At least three road segments from each district
  are evaluated annually.
• All edgeline crews and centerline crews are
  evaluated and all evaluations are conducted by
  two Central Office employees.
• No evaluations were conducted in 2005 due to an
  agency reorganization.
• Only waterborne paint markings are evaluated.

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Paint QA Overall Evaluation Criteria

• Width ? conformity with standard
• Thickness ? uniform standard thickness
• Placement ? along transverse and longitudinal
  lines
• Crispness ? minimal overspray
• Bead Retention ? near 100
• Bead Distribution ? uniform coverage
• Marking Reflectivity ? target 250 (white) 175
  (yellow)

From Operations Memorandum 99-02
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Paint QA Evaluation Procedures

• Equipment consists of a construction sign detail
  with two truck-mounted attenuators, a hand-held
  reflectometer, and a magnifying glass.
• A roadway is selected for evaluation from a list
  of roads painted within the last thirty days.
• Measurements are taken for one mile of the
  roadway.
• Edgelines, centerlines, and skip lines are
  evaluated.

From Operations Memorandum 99-02
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INDOTs Paint QA Experience

• Consistency in the overall quality of striping
  statewide increased.
• Disparity between districts in striping quality
  decreased.
• QA measurements allow INDOT to determine
  compliance with state and federal standards.
• Lower performing districts have an incentive to
  improve performance.
• A representative sample of the state highway
  striping characteristics is obtained.

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Sign QA Procedures
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Sign QA History Background

• Almost all sign maintenance is done by INDOT
  employees.
• Sign Quality Assurance Procedures were first
  developed in 2001
• 30 panel signs are evaluated, 5 from each
  district
• 310 sheet signs are evaluated, 10 from each
  sub-district
• All sign crews are evaluated and all evaluations
  are conducted by two Central Office employees.
• No evaluations were conducted in 2005 due to an
  agency reogranization.

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Sign QA Evaluation Criteria

Sheet Signs Height, Angle, Age, Size, Visibility,
Plumb, Application of Post, Correct Bolts
Washers, Overall Installation Panel
Signs Height, Angle, Plumb, Keeper Plate
Installation, Burred Threads, Base Height,
Mounting, Overall Installation
From Operations Memorandum 01-05
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Sign QA Evaluation Procedures

• Equipment consists of a laser-level mounted on a
  camera tripod, measuring tape, inclinometer, sign
  crew, and usually a safety crew with one or two
  truck-mounted attenuators.
• Roads are selected at random, although a
  preference is given to low ADT roads with wide
  shoulders.
• Five panel signs are evaluated per panel sign QA,
  and ten sheet signs are evaluated per sheet sign
  QA. Every other sign on the road is evaluated so
  that the QA covers a greater distance.

From Operations Memorandum 01-05
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2007 Sheet Sign QA Results
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2007 Panel Sign QA Results
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INDOTs Sign QA Experience

• Consistency in the overall quality of sign
  maintenance increased statewide.
• Allows the districts to verify their sign
  replacement schedule for the sub-districts.
• QA measurements allow INDOT to determine
  compliance with state and federal standards.
• Lower performing districts have an incentive to
  improve performance.
• A representative sample of the state highway
  striping characteristics is obtained.

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QA Program Costs

• Sign QA Costs Paint QA Costs
• 2 Traffic Control Technicians 460 per QA 460
  per QA
• 3 Safety Crew Technicians 241 per QA 241 per
  QA
• 3 Paint Crew Members (opt) N/A 241 per QA
• 2 Sign Crew Members (reqd) 161 per QA N/A
• 2 Truck-mounted Attenuators 74 per QA 74 per
  QA
• 2 Mid-size Sedans 77 per QA 77 per QA
• Handheld Reflectometer N/A 1,250 (annual cost)
• Other Materials 100 (annual cost) 100 (annual
  cost)
• Total Cost 1,016 per QA 1,048 per QA

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Conclusion

• INDOTs QA program has lowered the disparity in
  sign and marking quality between districts and
  improved the overall quality.
• Not all of the negative QA results have an effect
  on increasing quality in the next year.
• Total annual cost of INDOTs QA program is about
  56,500.

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Questions
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