The eastern Central Street grade crossing is scheduled to be reconstructed over the weekend of 2-3 November. Central Street in that area will be closed as of midnight Friday 1 November, and reopened before the first train on Monday 4 November.
The Martin Street grade crossing is scheduled to be reconstructed over the weekend of 9-10 November. Martin Street will be closed as of midnight Friday 8 November, and reopened before the first train on Monday 11 November.
Work will continue around the clock on both weekends to add second track and replace the signals. Message boards announcing the shutdowns will be placed a week before. Additional information will be available at that time.
http://actontrain.info/ has the latest updates from the South Acton Train Station Advisory Committee.