From Longman Dictionary of Contemporary Englishunderwayun‧der‧way /ˌʌndəˈweɪ $ -ər-/ ●○○ adjective [not before noun] 1 HAPPENhappening now The project is already well underway. Your peace will be shattered when the tourist season gets underway (=starts).2 TTTRAVELsomething such as a boat or train that is underway is moving → be under way at way1(10)
Examples from the Corpus
underway• Plans are underway to build a new stadium in the city.gets underway• The 13th annual Blues Festival gets underway today. 