Interstate 170 Maryland

I-170 Maryland
I-170 - Baltimore, MD Map


Interstate 170 was a planned spur to the north side of Downtown Baltimore from I-70 in the western portion of the city. Approved by the American Association of State Highway and Transportation Officials (AASHTO) on June 30, 1970, the short section of I-170 was completed in 1979. I-170 was signed along the route until 1983, when U.S. 40 replaced it from adjacent Franklin and Mulberry Streets.

Since Interstate 70 was never constructed in Baltimore, I-170 was never completed to its planned western terminus. A subsequent proposal called for turning the route southward to the planned interchange linking I-70 with Interstate 95 by Carroll Park. Had it been built, the urban loop would have been numbered as Interstate 595.

Route Information

  • East End – Baltimore, MD

  • West End – Baltimore, MD

  • Mileage – 1.2

  • Cities – Baltimore

  • JunctionsI-70

Source: estimate from Google Maps

Highway Guides

East End – US 40 / Martin Luther King, Jr. Boulevard – north of Downtown Baltimore, Maryland

Martin Luther King, Jr Bl north at I-170/US 40 - Baltimore, MD

A green out on this guide sign along Martin Luther King, Jr. Boulevard northbound concealed what was a shield for Interstate 170 west. U.S. 40 follows the freeway across the viaducts spanning the six lane boulevard ahead. 10/14/01

US 40 east at MLK Bl - Baltimore, MD

U.S. 40 eastbound at the Martin Luther King, Jr. Boulevard off-ramp. The freeway continues a short distance further to Greene Street. 01/02/01

West End US 1 US 40 – Northwest of Downtown Baltimore, Maryland

I-170 at US 1 - Baltimore, MD

Looking westward from the U.S. 1 overpass at the former stub end of Interstate 170. This structure was demolished by 2011 to make way for a two parking lots for the MARC West Baltimore station. 01/02/01

I-170 at US 1 - Baltimore, MD

The U.S. 1 overpass and unused roadway for I-170 eastbound. Pavement here was removed during construction for the MARC parking lots between September 2010 and Summer 2011. 01/02/01

Page updated December 11, 2020.