The first detour for the Casey Arborway project is slated for the week of April 27, according to the state Department of Transportation (MassDOT) website.

The exit of Forest Hills Street into Shea Circle will be temporarily closed, while traffic is detoured onto Cemetery Road. MassDOT did not list a time or day for the detour.

The Casey Arborway project will replace the Casey Overpass, which carries Route 203 over the Forest Hills T Station area. A new six- to eight-land surface road will be constructed. Demolition of the overpass is expected to start at the end of May.

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