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Home » Programs and Guidance » Mobile Pavement Marking Retroreflectivity Guidance

Mobile Pavement Marking Retroreflectivity Guidance

This presentation is designed to provide information relating to the retroreflectivity requirements for TxDOT Item 666 – Retroreflectorized Pavement Markings. This presentation is focused on mobile retroreflectometer measurements. Material in the presentation will help answer the following questions: What do the specifications call for? What are the providers required to do? What do the required data look like? How should the data from the providers be used?

If you have any questions or comments please contact Adam Pike, [email protected]. Some common questions will be answered in the FAQ section.

Full Presentation

Full Presentation (110-130 minutes)

You may download the full guidance presentation, or you may access its individual parts below. The listed times are an estimate of the time required to go through the presentation.

Part 1

Part 1: Introduction (5 minutes)

  • Objectives
  • Background
  • Specifications

Part 2

Part 2: Pavement Marking Specifications Concerning Mobile Retroreflectivity (20-25 minutes)

  • Item 666 – Retroreflectorized Pavement Markings
  • SS 6291 – Mobile Retroreflectivity Data Collection for pavement Markings

Part 3

Part 3: Mobile Retroreflectivity Programs (20-25 minutes)

  • Mobile Retroreflectivity Certification
    • Overview
    • Requirements
    • Certified Providers/Equipment
  • Mobile Retroreflectivity Verification
    • Overview
    • Responsibilities
      • TTI
      • TxDOT
      • Provider
    • Results
    • Maintaining Certification

Part 4

Part 4: Pavement Marking Retroreflectivity Equipment (25-30 minutes)

  • Portable Retroreflectometers
  • Mobile Retroreflectometers

Part 5

Part 5: Retroreflectivity Data Requirements and Analysis (35-40 minutes)

  • Specification Requirements
  • Data Analysis
    • Data Interpretation
      • Summary Spreadsheet Data
      • Map File
      • Video File
    • Comparison to Requirements
    • Common Issues
    • Next Steps

Part 6

Part 6: Questions and Comments (<5 minutes)

  • TTI Mobile Retroreflectivity Website
  • FAQs
  • Contact Information

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Programs and Guidance

  • Mobile Retroreflectometer Certification Program
    • About Certification
    • Certified Providers
  • Retroreflectivity Verification Program
  • Mobile Pavement Marking Retroreflectivity Guidance
  • Wet Retroreflectivity Measurement Guidance
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