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Maryland Route 99
Old Frederick Rd.
Route information
Maintained by MDSHA
Length	7.57 mi (12.18 km)
Major junctions
West end	MD 32 near Alpha
East end	US 29 in Ellicott City
Location
Country	United States
State	Maryland
Highway system
Maryland highway system Interstate US State Scenic Byways
← MD 98 → MD 100

Maryland Route 99 (MD 99 or Route 99) is a 7.57-mile (12.18 km) section of Old Frederick Road from Maryland Route 32 to U.S. Route 29 in Howard County, Maryland, United States. It is mostly a rural, two-lane road without shoulders, though it becomes more suburban near the east end. The road is bypassed and paralleled by Interstate 70 and U.S. Route 40 to the south.

Route description

Old Frederick Road begins much further west than MD 99's western terminus, at Twin Arch Road, a few miles east of Mount Airy. The county-maintained road enters state maintenance at its intersection with MD 32 north of the latter's interchange with Interstate 70. Recent development of the southeast corner of this intersection has yielded new facilities for the West Friendship Volunteer Fire Department. The fire department's access to MD 99 is directly across from an old alignment of MD 32 (now maintained as minor suffixed route MD 851J).

Beyond MD 32, MD 99 runs east through rural countryside. The highway passes to the south of Marriotts Ride High School and serves as the primary access point to the school complex. It intersects the southern terminus of Henryton Road (formerly designated Maryland Route 101) before forming the northern boundary of Alpha Ridge Park, the source of the Little Patuxent River. It intersects a major county road, Marriottsville Road, north of the Turf Valley Country Club. Continuing east it runs into more built-up suburban neighborhoods, eventually reaching the southern terminus of Woodstock Road (formerly part of MD 125) before entering the western suburban outskirts of Ellicott City.

Passing to the south of North Run Park, the route reaches the northern terminus of St. John's Lane, across from Mount Hebron High School. Continuing east, the route enters the small community of Mount Hebron and eventually intersects the northern terminus of U.S. Route 29, where the MD 99 designation terminates. Across from the intersection, Rogers Avenue continues east to cross I-70 and US 40 and eventually enter historic Ellicott City, and Old Frederick Road resumes at a traffic circle near Rogers Avenue's crossing of I-70.

History

Previously, MD 99 continued past US 29 onto Rogers Avenue into historic downtown Ellicott City, but the Rogers Avenue section has since been decommissioned. At one time, MD 99 east of St. John's Lane, including the former portion, was designated as Maryland Route 105, with MD 99 following St. John's Lane south to MD 144.

The current T-intersection between MD 99, Rogers Ave. and US 29 was originally intended to be an interchange, with a grade-separated freeway continuing north across the Patapsco River into Baltimore County. This freeway would have been part of the Baltimore Outer Beltway, segments of which were built and are now signed as MD 100 and US 29.

Several short segments of Old Frederick Road and Rogers Avenue east of US 29 remain part of the Maryland State Highway Administration's route log; they are designated as part of Maryland Route 985.

Junction list

The entire route is in Howard County.

Location	Mile	Destinations	Notes
Alpha	0.0	MD 32 (Sykesville Road) – Glenelg, Sykesville	Old. Frederick Road continues west of MD 32
	0.08	West Friendship Volunteer Fire Department
	0.49	Mount View Road south
	0.89	Marriotts Ridge High School
	1.3	Henryton Road north - Patapsco Valley State Park	former route of MD 101
	2.19	Marriott Manor Farm Road north
	2.87	To I-70 (Marriottsville Road) – Marriottsville, Ellicott City, Patapsco Valley State Park)
Woodstock	3.72	MD 125 (Woodstock Road) – Granite, Patapsco Valley State Park
	4.00	Dorchester Road
	4.29	Dorchester Road
	4.75	Green Clover Drive-Waverly Woods Drive
	5.02	Maplewood Road-Wetherburn Road
	5.19	Kings Arms Tavern Court-Raleigh Tavern Court
	5.77	Bethany Lane-Old Mill Road	Bethany Lane leads to US 40
	6.16	Weatherstone Drive north
	6.32	McKenzie Road north
Mount Hebron	6.56	To US 40 south (St. Johns Lane)	former route of MD 99
	6.96	Tiller Drive north
	7.17	Maple Rock Drive south
	7.31	Mount Hebron Dr. north
	7.57	US 29 south (Columbia Pike) – Ellicott City, Columbia, Washington D.C.	T-intersection between routes
MD 99 ends at US 29; road continues as Rogers Avenue

Related routes

• Maryland Route 32
• U.S. Route 29 in Maryland

See also

• List of Maryland state highways

References

1. ^ Maryland State Highway Administration, Highway Location Reference, 2005

External links

• MD 99 @ MDRoads.com
• MD 985 @ MDRoads.com

Template:Roads in Baltimore area

• State highways in Maryland