the montachusett regional transit authority (mart) is a public, nonprofit organization established under chapter 161b of the massachusetts general laws to provide public transportation to the montachusett region. mart is one of 15 massachusetts' regional transit authorities and provides public transportation to 21 communities within the montachusett region consisting of the cities of fitchburg, leominster and gardner, and the towns of athol, ashburnham, ashby, ayer, bolton, boxborough, hardwick, harvard, hubbardston, lancaster, littleton, lunenburg, royalston, shirley, sterling, stow, templeton, westminster, and winchendon.