Preliminary Work Begins This Week; Eight Week Closure and Detour Begins in Late-June

(June 6, 2019) –The Maryland Department of Transportation State Highway Administration (MDOT SHA) is beginning a project that will improve safety and overall intersection operations at the MD 180 (Jefferson Pike)/Mt. Zion Road intersection in Jefferson. The $3 million project, which includes constructing a roundabout at the intersection, will be complete by the end of the year.

To expedite the project, MDOT SHA’s contractor, Concrete General, Inc. of Gaithersburg, will close and detour MD 180 for eight weeks beginning after the Frederick County school system recess in mid-June (June 20). For motorists on MD 180, drivers will be detoured US 340, which runs parallel to MD 180. The detour for Mt. Zion Road will use Stone Road to Teen Barnes Road to MD 180 and back to Mt. Zion Road.

“Roundabouts are extremely effective at minimizing high-impact and serious crashes,” said MDOT SHA District Engineer John Concannon. “Since drivers are slowed as they negotiate roundabouts, angle crashes are sufficiently reduced, increasing safety for everyone who travels through this intersection.”

Since MDOT SHA started constructing roundabouts in 1994, there have been zero intersection-related fatalities. Click here to learn more about roundabouts on MDOT SHA highways.

Approximately, 4,000 motorists travel through this intersection every day. MDOT SHA appreciates motorist’s patience during the detour as we work hard to expedite the project. Click here for more information about this project.
(MDOT SHA Graphic: Rendering of proposed roundabout on MD 180 in Jefferson.)
MDOT SHA works hard to maintain safe traffic mobility in work zones for our crews as well as our contractor. Drivers need to stay alert, focus on the road and look for reduced speed limits, narrow driving lanes and highway workers. Drive like you work here and slowdown in construction zones.

For a list of all major MDOT SHA projects, click on Road Ready, MDOT SHA's electronic construction brochure. For a look at real-time commute conditions, log onto

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