Welcome To DIME

Data Interchange for Materials Engineering

DIME is a web application developed by the California Department of Transportation, Materials Engineering & Testing Services (METS) to allow material testing laboratories the ability to easily submit sample information and test data to Caltrans' database via the internet.


To provide a user-friendly web-based interface for storing and sharing material data.

User Account

Need Access to DIME?

You will need an account to submit sample and test result information. The first step is to reach out to your DIME organization manager. If you are unsure who that person is, you may search for your organization and request access. If your company, lab or organization is new to DIME, you may also request that a new DIME organization account be created.

Need Help?

Need Help with DIME?

DIME is easy to use but help is here when you need it. We have a collection of help documents and instructional videos to give you an overview of the system, assist you in the submission of sample information, provide test results and inform you of other useful DIME features. We are also here to answer any questions you may have. Start by taking a look at some frequently asked questions — with answers.

Test Standards

ASTM, AASHTO and CTM Support

DIME supports the submission of test results for many ASTM, AASHTO, and CTM standard test methods for a large variety of material types. User-submitted test result data will be validated against the standards outlined in the official test method document which improves data completeness and accuracy.

Reports and Notifications

Electronic Reports and Notifications

Since DIME stores data electronically, it is not only easy to search for samples and test results saved in the system, but notifying resident engineers, METS Representatives or other project personnel about sample information or test results can be sent via automated email with a few clicks of the mouse. There are also useful reports available based on the data stored in DIME such as usage statistics, testing turn-around reports and more.