Pursuant to the Federal Advisory Committee Act, the Environmental Protection Agency (EPA) announces an upcoming meeting of the Mobile Sources Technical Review Subcommittee (MSTRS), which is a subcommittee under the Clean Air Act Advisory Committee (CAAAC). This is a virtual meeting and open to the public. The meeting will include discussion of current topics and presentations about activities being conducted by EPA's Office of Transportation and Air Quality related to developing a workgroup charge around locomotives. MSTRS listserv subscribers will receive notification when the agenda is available on the Subcommittee website. To subscribe to the MSTRS listserv, send an email to MSTRS@epa.gov.