The Green Line Extension, which extends the Green Line north into Somerville and Medford, includes the closure and replacement of Lechmere station. The new station will be elevated on the east side of O'Brien Highway. Entrances will be located north of North First Street and south of East Street, with a busway off Water Street. Both entrances will have elevators and stairs to the curved island platform, which will be long and wide. A bike station between the entrances will hold 182 bicycles. Public artwork at the station will include "Field Notes" by Randall Thurston – a set of panels on an elevator shaft depicting birds and vines. Some panels on station signs will have artwork of poetry overlaid with images of birds; others will have historical images and interpretive text.