JP residents recently learned that one side of the platform at Forest Hills T will be closed starting next week through December. An MBTA spokesperson says the change "should have no impact on customers other than the fact they will be boarding on the southbound side." Joe Pesaturo of the T said the agency does not anticipate delays during the closure. One side of the platform will be closed to accommodate work on the Casey Arborway. Pesaturo, in a voice mail to Jamaica Plain News, said the T has a plan so that during rush hour as many trains can enter and leave on one side as do currently on two.