According to The Infrastructurist, the Central Link portion of Sound Transit’s light rail system is the second priciest in the nation over the last decade. And the only reason it is No. 2 is because the website included Puerto Rico.
The Tren Urbino in San Juan is the most expensive at $2.63 billion with Central Link at $2.4 billion. Third is the Hudson-Bergen, New Jersey light rail line.
The link takes you to a slide show with all 10.