California Department of Transportation
Coronado Bridge Carquinez Bridge San Francisco/Oakland Bay Bridge Richmond San Rafael Bridge

Materials Engineering and Testing Services

Office of Roadway Materials Testing

This Office of Roadway Materials Testing (ORMT) assists a wide variety of Caltrans staff with materials engineering consultation in all aspects of roadway design, construction, rehabilitation and maintenance. ORMT staff maintain expertise in the fundamental properties of material and test methods employed in their evaluation. ORMT also include Chemical Testing, Electrical Testing, Instrumentation Services branches.

  • Asphalt Binder and Hot Mix Asphalt Laboratory

    The Asphalt Binder Lab conducts a wide variety of tests in accordance with the California Test methods, AASHTO and ASTM, on polymer modified, rubber modified and air refined asphalt binders. This lab uses "state of the art" equipment developed in the State Highway Research Program (SHRP) and is AASHTO accredited.

    The Hot Mix Asphalt Lab conducts routine testing of asphalt concrete mixtures to assist the District labs and offers technical support to Caltrans and the Industry. This lab is instrumental in development of the asphalt concrete specifications and new test methods. This lab gets involved in validating the test results and assists the districts with failure investigation and is AASHTO accredited.

  • The Independent Assurance Branch and Reference Sample Programs ensure the enforcement of the Independent Assurance Program (IAP), which requires that each State Highway Agency (SHA) develop and adhere to a quality assurance program per the Code of Federal Regulations Title 23 CFR 637. It also, evaluates the correlation of District, Local agency and private laboratories with its Reference Sample Program (RSP) to assure common standards. This group calibrates Caltrans and local agency laboratory equipment.
  • The Skid Testing Services Branch provides skid resistance testing and portable skid testing.
    To request Skid Testing Services, complete the Skid Test Request Form.
  • The Chemical Testing Branch provides testing and problem-solving services whenever the chemical content of materials and products are involved.
  • The Electrical Testing Branch is responsible for the quality assurance testing of the more than 10,000 traffic signal control devices and lighting products purchased each year by Caltrans.
  • The Instrumentation Services Branch provides structural instrumentation, equipment repair, and electronic design and consulting services to customers within Caltrans.


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