If you are a regular commuter to Tysons Corner, then you know all to well about the construction of the Dulles Metro Rail.  What you might not realize is that the construction you see on the streets is only part of the construction project as a whole.  Beneath the ground work crews are working around the clock to mine a 2,400 foot tunnel from Route 123 to Route 7.  To ensure the safety of the mining project, crews are using sensor technology to monitor the tunnel's progression and the road above for any movements. 

To read more about the continuing construction of the Dulles Metro Rail, visit the projects website at www.dullesmetro.com.  There you can read the November newsletter (click image below) that explains more about the tunneling project, traffic pattern changes, station construction and other related topics.