A roundabout at Conley Road and Business Loop 70 is open to traffic, although signage is still being installed.
The project, expected to begin in spring 2028, was described by one official as a “game changer” for the city’s East End.
Two of the play parks should be open in time for the school summer holidays, the council says.
Worcester’s Horizon Hub, Ronkswood Hub and Medway Road play areas are set for £331,000 upgrades this summer following public consultation.