The roundabout in Glen Arm, located along Harford Road at Mt. Vista Road and Glen Arm Road, has been completed.
The State Highway Administration will briefly return in spring 2018 to apply the final surface, as temperatures are not favorable to do so during the the winter months.
Mt. Vista Road, which had been closed for the past two months, reopened at 3 p.m. on Thursday.
The $3.7 million roundabout project, which began fall 2016, necessitated temporary phased closures and detours of Mt. Vista Road and Glen Arm Road throughout the duration of the project. Harford Road, which has an average daily traffic volume of 6,000 vehicles, was not closed during construction.
MDOT SHA has built dozens of roundabouts at intersections across Maryland over the last 25 years, eliminating intersection-related fatal crashes.