I-170 would have begun at a directional-T interchange with I-70 where Baltimore Street and Amtrak's Northeast Corridor cross Gwynns Falls. The Interstate would have paralleled the north side of the railroad tracks through what is presently an industrial area. I-170 would have crossed Mulberry Street (eastbound US 40) and veered east through what are now parking lots for the West Baltimore station on MARC's Penn Line to seamlessly connect with the portion of I-170 that was constructed east of Pulaski Street. The unconstructed freeway would have had an eastbound exit ramp to Mulberry Street and a westbound entrance ramp from Franklin Street (westbound US 40), with both ramps also having direct access to and from Monroe Street (southbound US 1). These ramps, which were partially constructed when the highway was built and torn down in 2010, would have connected US 1 with I-170 in the direction of I-70.