Trunk route 550 will be diverted 5 June - 12 August due to the renovation of the bridge over Lahdenväylä. The bus will run via Viikintie to Hernepellontie, from where it will continue along its normal route along Maaherrantie. The bus will not serve bus stops along the diversion route.
At the same time, the timetables of the route will change. The bus will start to leave from Itäkeskus 4 minutes earlier and arrive at Itäkeskus 4 minutes later. However, the stop-specific timetables between Westend and Viikinmäki will not change. Stop-specific timetables will change only at stops between the Viikki Science Park and Itäkeskus. The timetables will change again at the beginning of the summer timetable season on 18 June. 
Timetables of route 550 from 5 June to 17 June.
