The California Air Resources Board (CARB) is developing a heavy-duty inspection and maintenance (HD I/M) program for heavy-duty vehicles with gross vehicle weight rating (GVWR) greater than 14,000 pounds that operate in California. This HD I/M program will likely utilize periodic Onboard Diagnostic (OBD) testing to determine program compliance. CARB's contractor, Eastern Research Group (ERG) is conducting this survey on heavy-duty fleets to gather information related to the current usage of telematics and logistic services and vehicle repair and maintenance practices of heavy-duty fleets in an effort to help inform program development. CARB staff encourages interested stakeholders to participate in the survey through the link below by February 26, 2021. The survey results will provide vital information to help ensure the development of an effective HD I/M program.