U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

 
Report
This report is an archived publication and may contain dated technical, contact, and link information
Publication Number: FHWA-RD-01-164
Date: March 2002

Figure I-14

Previous | Table of Contents

Figure I-14: 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.

 

Previous | Table of Contents