Alert Montgomery issued a “Severe Traffic Alert” at 6:12pm Monday evening for “emergency roadwork that closes various lanes of northbound I-270 before Exit 4A (Montrose Road MD-927)”. Per the alert, “Expect significant delays. Seek alternate route.”
7:10pm Update: all traffic lanes open on northbound I-270 before Exit 4A (Montrose Road MD-927). Expect residual delays.