Maryland Route 26 is a state highway in the U.S. state of Maryland. Known for most of its length as Liberty Road, the state highway runs 44.10 miles (70.97 km) from U.S. Route 15 in Frederick east to MD 140 in Baltimore. MD 26 connects Frederick and Baltimore with the highway's namesake of Libertytown in eastern Frederick County, the suburban area of Eldersburg in southern Carroll County, and the western Baltimore County suburbs of Randallstown, Milford Mill, and Lochearn. The highway also serves as a major thoroughfare in the western part of Baltimore, where the street is named Liberty Heights Avenue. MD 26 is maintained by the Maryland State Highway Administration outside of Baltimore and by the Baltimore City Department of Transportation within the city.

U.S. Route 15 (US 15) is a part of the United States Numbered Highway System that runs from Walterboro, South Carolina, north to Painted Post, New York. In Maryland, the highway runs 37.85 miles (60.91 km) from the Virginia state line at the Potomac River in Point of Rocks north to the Pennsylvania state line near Emmitsburg. Known for most of its length as Catoctin Mountain Highway, US 15 is the primary north–south highway of Frederick County. The highway connects the county seat of Frederick with Point of Rocks, Leesburg, Virginia, and Charles Town, West Virginia, to the south and with Thurmont, Emmitsburg, and Gettysburg, Pennsylvania, to the north. US 15 is a four-lane divided highway throughout the state except for the portion between the Point of Rocks Bridge and the highway's junction with US 340 near Jefferson. The highway is a freeway along its concurrency with US 340 and through Frederick, where the highway meets US 40 and Interstate 70 (I-70). US 15 has a business route through Emmitsburg.