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Publication Number: FHWA-RD-01-164
Date: March 2002

Flowchart

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Flowchart. Flowchart for assessing likelihood of MRD. This flowchart shows how to narrow down whether a specific problem is an MRD when performing field and maintenance records surveys.

Each of the following numbered scenarios show that the problem is probably an MRD.

  1. Cracking is present, and is concentrated and parallel at joints.
  2. Cracking is present with staining and/or exudate, but it is not concentrated and parallel at joints.
  3. Cracking is present as progressive map cracking, but it is not concentrated and parallel at joints, nor is there any staining and/or exudate.
  4. Cracking is not present, however, there is joint deficiency and spalling with staining or exudate.
  5. Cracking is not present, however, there is joint deficiency with progressive joint deterioration without evidence of spalling, staining or exudate.
  6. Cracking is not present, neither are joint deficiencies, scaling, or evidence of expansion; however, progressive popouts are occurring.
  7. Cracking and joint deficiencies are not present, but scaling is occurring but it is not progressive and there is no evidence of exudates or staining.
  8. Cracking is not present, neither are joint deficiencies or scaling, but there is evidence of expansion.

Each of the following numbered scenarios, show that the problem is probably not an MRD.

  1. Cracking, joint deficiency, and scaling are not present, and there is no evidence of expansion or excessive or progressive popouts.
  2. Cracking and joint deficiency are not present, but scaling, exudate or staining is present but with no evidence of expansion or excessive or progressive popouts.
  3. Cracking, joint deficiency, exudates or staining, evidence of expansion, and excessive or progressive popouts are not present but progressive scaling is present.

All of the above scenarios also apply if cracking is present but it is not progressive map cracking.

 

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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
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