Specifications include, but are not limited to: The Massachusetts Bay Transportation Authority (MBTA) seeks to purchase new sliding rail expansion joint assemblies to replace expansion joints currently in revenue service on ballasted track on the Rapid Transit and Light Rail Transit lines. These specifications call for the design, fabrication, testing, shop assembly, inspection, packaging and delivery of expansion joints as outlined in this document and attached drawing in accordance with industry standards. A total of 12 pairs (12 each LH and 12 each RH) are to be furnished per this specification. Successful bidder must be able to deliver the expansion joints specified in this document within 120 days of shop drawing approval by the MBTA.