In an effort to replace the aging the critical Orange and Red line vehicle fleets, the Massachusetts Bay Transportation Authority (MBTA) contracted with STV to serve as the lead consultant for the procurement of 404 heavy rail vehicles. These lines carry more than 450,000 passengers per day and link North and South stations -- two key multimodal transit centers in Boston.

STV developed technical specifications and supported the authority throughout a comprehensive selection process. The firm provided support during the design review phase of the project and further supported the MBTA with inspection, testing, and warranty services.