Maryland Route 100

Maryland Route 100
Paul T. Pitcher Memorial Highway
Route information
Maintained by MDSHA
Length:	22.05 mi (35.49 km)
Major junctions
West end:	US 29 in Columbia
	MD 108 MD 103 I-95 US 1 MD 295 MD 170 I-97 MD 2 MD 10
East end:	MD 177 in Pasadena
Highway system
Maryland highway system Interstate • US • State • Scenic Byways • Turnpikes ← MD 99 MD 103 →

Maryland Route 100 (MD 100 or Route 100) is a major east–west highway connecting U.S. Route 29 (US 29) in Ellicott City (just north of Columbia) and MD 177 (Mountain Road) in Pasadena. MD 100 also connects to Interstate 95 (I-95), US 1, the Baltimore-Washington Parkway (MD 295), and I-97. The highway connects Howard County to the west with Anne Arundel County and the Chesapeake Bay to the east. MD 100 also provides access to the Baltimore-Washington International Airport (BWI) and the Arundel Mills shopping mall.

The eastern section of MD 100 in Anne Arundel County is known as the Paul T. Pitcher Memorial Highway. The name comes in dedication to Paul T. Pitcher, an Anne Arundel County executive, who originally conceived the highway.

Route description

The route begins as a six-lane divided expressway at US 29 near Ellicott City. There are then interchanges with MD 108, MD 104, Snowden River Parkway and MD 103.

At the junction with I-95, the road narrows to four lanes. Then MD 100 intersects with US 1 followed by an exit for Dorsey MARC station. It then crosses the Baltimore-Washington Parkway.

MD 100 then intersects with MD 170 (Telegraph Road) where the road becomes 6 lanes. Then the road junctions with Interstate 97 near Hanover and reduces down to 4 lanes before crossing MD 2. Between Glen Burnie and Jacobsville, MD 100 serves as a bypass for MD 177, and has interchanges with MD 10 and MD 607.

The road ends by merging back into MD 177.

History

Maryland Route 100 began in the 1970s as two separate roads, both having the MD 100 designation. The first was known as the Mountain Road Extension, stretching between Governor Ritchie Highway and the old Maryland Route 3, now Interstate 97. The second was built as a short spur between the newly constructed Interstate 95 and US 1 in Elkridge, Maryland. The eastern section, originally known as the Mountain Road Bypass, was constructed east of Ritchie Highway in the late 1970s. MD 100 was completed west of I-97 to I-95, thereby connecting the two roads, in 1994, but it was not completed in its entirety to US 29 until November 1998. A portion of the route between Exit 1B-C and Exit 2 was constructed earlier than the rest as an at-grade boulevard, on the right-of-way of the future eastbound lanes; this section was eventually upgraded.

The construction of the route near Lake Waterford Road severed the original road between Baltimore and Annapolis: the Baltimore-Annapolis Boulevard, signed in part as MD 648. The physical road ends at a pair of dead ends on either side of the right-of-way; MD 648 follows Lake Waterford Road between Baltimore-Annapolis Boulevard and MD 177 before rejoining its original path.

The route is part of the Baltimore Outer Beltway, a 3/4 circular beltway designed to provide a route parallel to the Baltimore Beltway. MD 100 represents the major portion that was built; US 29 between MD 100's terminus and US 29's own northern terminus at Maryland Route 99, four miles (6 km) in length, is another portion. The Outer Beltway was projected beyond MD 99 to run through Howard and Baltimore Counties and intersect MD 140, Interstate 83, US 1, and Interstate 95 before terminating at US 40 northeast of Baltimore.

Junction list

County	Location	Mile	Exit	Destinations	Notes
Howard	Ellicott City	0.0		US 29 to I-70 – Columbia, Ellicott City
		0.7	1A	Long Gate Parkway to MD 103	no westbound exit
		1.4	1B	Centre Park Drive	no eastbound exit; westbound entrance/exit signed as 1B-C
			1C	Executive Park Drive to MD 108	eastbound entrance and eastbound exit
		2.5	2	MD 104 / MD 108
	Columbia		3	Snowden River Parkway – Columbia
			4	MD 103 (Meadowridge Road)
	Elkridge	5.4	5	I-95 – Baltimore, Washington, D.C.	split into 5A and 5B
		6.1	6	US 1 (Washington Boulevard) – Elkridge, Waterloo	split into 6A and 6B on eastbound side only
		6.8	7	Dorsey MARC Station	No trucks over five tons.
Anne Arundel	Dorsey	7.4	8	Coca-Cola Drive to MD 103
		8.1	9	MD 295 (Baltimore-Washington Parkway) – Baltimore, Fort Meade	split into 9A and 9B
	Hanover	9.1	10	MD 713 (Arundel Mills Boulevard) – Hanover, Arundel Mills	split into 10A and 10B
		11.1	11	MD 170 (Telegraph Road) – Odenton, Linthicum
		13.6	13	I-97 to MD 3 / MD 32 – Baltimore, Annapolis	split into 13A and 13B. To Baltimore via I-695 and I-895
	Glen Burnie	14.2	14	MD 174 (Quarterfield Road)	eastbound exit and westbound entrance
		15.6	15	Oakwood Road
		16.8	16	MD 2 – Glen Burnie, Pasadena	split into 16A and 16B; 16B on westbound provides access via MD 177
		17.4	17	MD 10 north to I-695 – Glen Burnie	westbound exit and eastbound entrance
		18.3	18	MD 10 south to MD 2 – Severna Park	eastbound exit and westbound entrance
		19.8	19	Catherine Avenue	eastbound exit and westbound entrance
		20.6	20	Edwin Raynor Boulevard to MD 173 (Fort Smallwood Road)	eastbound exit and westbound entrance; MD 100 becomes four-lane at-grade expressway
	Jacobsville	21.2		MD 607 (Magothy Bridge Road) to MD 177
				Magothy Beach Road
		22.1		MD 177 (Mountain Road) – Lake Shore, Gibson Island	eastbound exit and westbound entrance; eastern terminus of MD 100

See also

• U.S. Roads portal
• Maryland portal

External links

• MD 100 @ MDRoads.com
• Steve Anderson's DCroads.net: Paul T. Pitcher Memorial Highway (MD 100)