The Virginia Department of Transportation will intermittently close westbound lanes on I-66 from midnight to 5 a.m. Friday to accommodate the installation of two gantries between the Fairfax County Parkway and Route 28. Closures will last up to 30 minutes. VDOT announced the probability of lane closures early November 2014. The traffic system will begin operating between Route 29 in Centreville and the Capital Beltway in early 2015. "The closures are part of the Virginia Department of Transportation’s ongoing effort to install 36 new gantries as part of the I-66 Active Traffic Management System (ATMS)," VDOT said. "The first gantry went up in mid-November on I-66 East just before Route 28."