Route 100 West

MD 100 begins as an expressway with two at-grade intersections from its half diamond interchange with MD 177 (Mountain Road). The first signal governs the intersection of MD 100 with Magothy Beach Road. The second signal resides at the crossroads of the expressway with MD 607 (Magothy Bridge Road). MD 607 travels a short distance between Woods Road and MD 173 (Fort Smallwood Road).

10/10/04

MD 100 upgrades into a four lane freeway west of MD 607 (Magothy Beach Road). On-ramps join the freeway from Raynor Boulevard (Exit 20) and Catherine Avenue (Exit 19). There are no exits however between MD 607 and the merge with MD 10 (Arundel Expressway). Pictured here are guide signs directly travelers to MD 10 north and MD 100 west at the freeway merge at Pasadena. There is no access to MD 10 southbound.

10/10/04

MD 10 (Arundel Expressway) comprises a freeway north from MD 100 to Interstate 695 (Baltimore Beltway) at Glen Burnie. MD 100 turns westward and meets MD 177/2 (Ritchie Highway) and I-97 within the next four miles.

10/10/04

Westbound reassurance marker of MD 100 posted as the freeway leaves the cloverleaf interchange with Baltimore-Washington Parkway and passes by Parkway Center industrial park.

06/20/12

MD 100 enters a diamond interchange (Exit 8) with Coca Cola Drive ahead of the Howard County line.

06/20/12

MD 100 expands to four lanes briefly for the Exit 8 off-ramp to Coca-Cola Drive. Dorsey Road west from near Exit 8 becomes MD 103, an 8.29 mile route winding northwest parallel to MD-100 through Howard County.

06/20/12

Exit 8 departs MD 100 west for Coca Cola Drive connects the freeway with parallel Dorsey Road (former MD 176) to the south and Park Circle Drive to the north. This stretch of road is unsigned MD 100 segment "M".

06/20/12

Spanning Deep Run, drivers leave Anne Arundel County and enter Howard County.

06/20/12

The Exit 7 ramp to Dorsey Station (MARC commuter rail) quickly follows the county line. This interchange does not provide access to Dorsey Road (MD 103).

06/20/12

U.S. 1 (Washington Boulevard) meets MD 100 next at a six-ramp parclo interchange (Exit 6). Interstate 95 (Exits 5A/B) follows in one mile.

08/27/05

Reassurance shield posted for MD 100 ahead of the Exit 6 off-ramp to U.S. 1. U.S. 1 travels southwest to Waterloo and Jessup and northeast to Elkridge, primarily as a local route parallel to Interstate 95.

08/27/05

Interstate 95 and MD 100 come together just northwest of Wesley Grove and U.S. 1. Interstate 95 constitutes an eight lane freeway between the Baltimore and Capital Beltways.

07/02/10

The right lane carries all traffic in unison to Interstate 95 via Exits 5A/B. MD 100 continues northwest to the Howard County suburbs east of Columbia otherwise.

07/02/10

Exit 5 departs MD 100 west for Interstate 95. Interstate 95 north continues three miles to the split with Interstate 895 (Harbor Tunnel Thruway) north into Baltimore.

08/27/05

Exit 5 partitions into single lane ramps for Interstate 95. Southbound Interstate 95 heads 10 miles to Laurel and 16 miles to the merge with Interstate 495.

07/02/10

MD 103 follows Meadowridge Road northwest from Dorsey Road at U.S. 1 to a diamond interchange with MD 100 (Exit 4).

08/27/05

Exit 4 utilizes roundabouts between the freeway ramps of MD 100 and Meadowridge Road. MD 103 parallels MD 100 northwest to Font Hill and Montgomery Knolls.

08/27/05

Snowden River Parkway meanders southwest from MD 100 (Exit 3) to Long Reach and Owen Brown.

08/27/05

MD 100 westbound parts ways with the Exit 3 off-ramp at the Old Montgomery Road under crossing. Snowden River Parkway intersects MD 108 (Waterloo Road) nearby and ends at Broken Land Parkway near MD 32 and Guilford.

08/27/05

Interchange sequence sign listing the final three interchanges of MD 100 west.

08/27/05

MD 108 continues parallel to MD 100 along Waterloo Road to MD 104 at Jonestown. MD 108 turns west onto Old Annapolis Road to Columbia as MD 104 begins and carries Waterloo Road north to Exit 2.

08/27/05

Motorists leaving MD 100 via Exit 2 enter a roundabout with MD 104 (Waterloo Road) adjacent to the freeway. MD 104 travels 1.14 miles between MD 108 and 103 (Montgomery Road).

08/27/05

Entering the final 1.50 miles of MD 100 west. The next exit entails a left side ramp onto Executive Park Drive (Exit 1B).

08/27/05

Executive Park Drive spurs west from MD 100 to a town home community and residential subdivision beyond the adjacent office parks. Exit 1C joins MD 100 east with Centre Park Drive nearby. Motorists using Exit 1B must use Columbia 100 Parkway to make that connection, which is signed as "Exit 1C" from MD 100 west.

08/27/05

Exit 1B consists of a left turn onto Executive Park Drive by the eastbound MD 100 overpass. Centre Park Drive links MD 100 east via a similar tight-ramp configuration to MD 108 (Old Annapolis Road) at Columbia Hills.

08/27/05

Long Gate Parkway (unsigned MD 100 Segment "J") connects MD 100 (Exit 1A) with adjacent MD 103 (Montgomery Road).

08/27/05

MD 100 prepares to split into ramps for U.S. 29 (Columbia Pike) ahead of the Exit 1A ramp departure to Long Gate Parkway.

08/27/05

U.S. 29 constitutes a freeway as well, traveling north to Ellicott City and south past the Columbia Town Center.

08/27/05

MD 100 west defaults onto U.S. 29 north to U.S. 40 (Baltimore National Pike) and Interstate 70 (Exit 25). A left side ramp carries drivers onto U.S. 29 (Columbia Pike) south to Columbia, Scaggsville, and Washington, DC.

08/27/05