The Los Angeles County Metropolitan Transportation Authority (Metro) on Monday unveiled two new tunnel boring machines (TBMs) for the authority's $9.3 billion Purple Line Extension project, which will connect subway transit service from downtown Los Angeles to the city's westside by 2027.
Tutor Perini clashes with city's transportation agency over alleged design flaws that may push past December completion of its already-delayed $1.6-billion rail project.
