Säterinkuja is and will be dead end for cars. Connection to Linnoitustie is currently  blocked by road and tram construction. After the construction is ready there  will be path only for predestrians and bicycles.
Sources for future after construction is finished:
https://raidejokeri.info/wp-content/uploads/2019/06/Linnoitustie-katusuunnitelma.pdf
https://raidejokeri.info/wp-content/uploads/2019/01/RJ_Koostekartta_Espoo.pdf
