Interstate 195 Maryland

East End
West End


Interstate 195 provides a high speed route to the passenger terminal of Thurgood Marshall Baltimore-Washington International Airport (BWI) from Interstate 95 at Arbutus. The freeway also comprises a commuter route with connections to Baltimore-Washington Parkway (Maryland 295), U.S. 1 and Maryland 170. The north end serves the University of Maryland – Baltimore County (UMBC) campus and 483 space park & ride lot at Catonsville.


The freeway for I-195 previously consisted of two independent sections. Designated as Maryland 46, the southern segment spurred south from a three-wye interchange at B/W Parkway to the newly opened Friendship International Airport in 1952. The northern route, posted as Maryland 166, connected I-95 south with U.S. 1 near Elkridge in August 1974 and north to the new campus of UMBC in 1975. Due to the cancellation of Interstate miles elsewhere in the state,1 AASHTO approved the designation of Interstate 195 from I-95 and Maryland 166 southeast to BWI Airport on November 15, 1975.

Efforts to complete the 1.5 mile long section linking the two freeways were delayed by an extended environmental review process needed for the stretch through Patapsco Valley State Park and a focus on construction funds elsewhere in the state. The route was ultimately completed on June 20, 1990, as were upgrades to Interstate standards on the original MD 46 section.1

A $1 million project overhauled the Catonsville park and ride lot at the north end of Interstate 195 from June to fall 2012. The work shifted the Rolling Road entrance to lie adjacent to the park and ride exit and left-hand turn from I-195 to Rolling Road south. A traffic light was installed there as well. Additional work removed 25 spaces at the northern portion of the lot to accommodate new green space.2

A short section of Interstate 195 was withdrawn from the Interstate System by request of the Maryland Department of Transportation on September 1, 2015. This removed I-195 from south of Maryland 170 (Aviation Boulevard) to the Thurgood Marshall Baltimore-Washington International Airport (BWI) terminal area. The withdrawal was approved by the Federal Highway Administration. An eastbound confirming marker was posted beyond MD 170 in 1993. Eastbound end signs were added beyond the interchange by 2010.

Route Information

  • East End – Linthicum, MD

  • West End – Arbutus, MD

  • Mileage – 4.35

  • Cities – none

  • JunctionsI-95

Source: December 31, 2018 Interstate Route Log and Finders List

I-195 Annual Average Daily Traffic (AADT)

Location Vehicles per day
BWI Airport to Exit 1 39,492
Exits 1 to 2 77,690
Exits 2 to 3 54,126
Exits 3 to 4 54,052
I-95 to MD 166 36,660
I-195 Maryland - 1974 Map
1974 General Drafting map showing the original MD 46 freeway and initial construction of the MD 166 freeway at I-95.

Prior to the freeway upgrade, Maryland 166 consisted of a surface route using Rolling Road south from Gun Road to U.S. 1 (Washington Boulevard) at Saint Denis.

I-195 Maryland - 1984 Map
1984 ADC Baltimore County Atlas showing Metropolitan Boulevard prematurely complete.

The 1.5 mile section between U.S. 1 (Washington Boulevard) and Maryland 295 (B/W Parkway) was proposed as a northern extension of Maryland 46 before the designation of Interstate 195.1

Highway Guides

East End MD 170 – Linthicum, Maryland

Perspective from Interstate 195 east
Ramps for Maryland 295 (B/W Parkway) combine to merge onto I-195, one half mile ahead of the freeway end at Maryland 170 (Exits 1B/A). Photo taken 06/06/12.
Interstate 195 eastbound at Exit 1B for Maryland 170 (Aviation Boulevard) south. MD 170 travels around the western periphery of the airport to MD 176 en route to the MD 100 freeway, Severn and Odenton. Photo taken 06/06/12.
Exit 1A loops away from I-195 east to Linthicum as Metropolitan Boulevard enters BWI Airport. Maryland 170 comprises a 13-mile route from MD 175 at Odenton to MD 2 by Brooklyn Park. Photo taken 06/06/12.
A pair of end signs for Interstate 195 stand ahead of the on-ramp from MD 170 (Aviation Boulevard). The freeway transitions to Friendship Road, a loop serving the passenger terminal and other airport facilities. Photo taken 06/06/12.
Perspective from Friendship Road west
Exiting the passenger terminal, Friendship Road separates into ramps for I-195 (Metropolitan Boulevard) west and Elm Road north toward MD 170 (Aviation Boulevard). Photo taken 06/06/12.
A pair of shields for I-195 appear as the lower level of Friendship Road merges with the upper level just ahead of the freeway beginning. Photo taken 06/06/12.
A second confirming marker for I-195 appears at the Elm Road on-ramp to Metropolitan Boulevard north. The adjacent exit provides return access to the terminal and additional parking. Photo taken 06/06/12.
Exit 1 for Maryland 170 (Aviation Boulevard) departs in one quarter mile at the official beginning of Interstate 195. Signs for Interstate 97 direct motorists around BWI Airport using MD 170 and MD 162. Photo taken 06/06/12.
Although signed as an east-west route, Interstate 195 leads north from Exit 1 to Maryland 295 (B/W Parkway) and Interstate 95 at Arbutus. Both freeways connect the airport with Baltimore and Washington. Photo taken 06/06/12.
Maryland 170 (Aviation Boulevard) connects BWI Airport with rental car facilities and MARC commuter rail just to the west. The state route leads south to Severn and Odenton and north to Linthicum and Brooklyn Park. Photo taken 06/06/12.
Perspective from Maryland 170 north
Northbound Maryland 170 (Aviation Boulevard) at the six-ramp parclo interchange with Interstate 195 west and Friendship Road east to Thurgood Marshall Baltimore-Washington International Airport (BWI). Photo taken 08/27/05.

West End I-95 MD 166 – Arbutus, Maryland

Perspective from Maryland 166 (Rolling Road) south
Maryland 166 (Rolling Road) south reaches the Catonsville park & ride lot, where Interstate 195 (Metropolitan Boulevard) begins. The state route ends as Rolling Road continues south to Selford Road. Photo taken 06/00.
Perspective from Rolling Road north
Rolling Road north at the right turn for Interstate 195 south to I-95 and BWI Airport. Photo taken 10/10/04.
Maryland 166 emerges from I-195 to overtake South Rolling Road north into Catonsville. The park & ride lot entrance is located between the freeway roadways to the right. Photo taken 10/10/04.
Perspective from Interstate 195 west
Passing over Francis Avenue, Interstate 195 west enters the directional interchange (Exits 4A/B) with Interstate 95. I-95 north meets the Baltimore Beltway next. Photo taken 12/28/07.
An end shield for Interstate 195 stands ahead of the loop ramp (Exit 4B) for I-95 south to Washington. Signs reference the remaining 1.1 miles of Metropolitan Boulevard as MD 166. Photo taken 08/27/05.


  1. Metropolitan Boulevard (I-195),
  2. “SHA to give Southwest Park and Ride in Catonsville $1 million makeover.” The Baltimore Sun, May 22, 2012.

Page updated June 26, 2020.