HNTB’s growing tunnel team is working on many of the nation’s most complex and innovative tunnel projects NEW YORK– Ana Maria Ruiz Jimenez, Ph.D., joined HNTB Corporation’s national tunnel practice…

Micro-Dust Gets More Attention as Underground Rail Traffic Grows By Dr. Bernd Hagenah No matter the location, underground rail systems are all burdened by an invasive, environmentally hazardous problem —…