I-270 Innovative Congestion Management (ICM) Ramp Metering
I-270 is a critical 30-mile interstate from I-70 in Frederick, MD to I-495 in Washington, DC, carrying over 200,000 vehicles per day in some segments. I-270 has been plagued by recurring and non-recurring congestion and delays for many years. In 2016, Maryland Department of Transpor