 Maryland Route 194 ( MD 194 ) is a state highway in the U.S. state of Maryland . The state highway runs 23 @.@ 87 miles ( 38 @.@ 42 km ) from MD 26 in Ceresville north to the Pennsylvania state line near Taneytown , where the highway continues as Pennsylvania Route 194 ( PA 194 ) toward Hanover . MD 194 is the main highway between Frederick and Hanover ; the state highway connects the towns of Walkersville and Woodsboro in northeastern Frederick County with Keymar and Taneytown in northwestern Carroll County . MD 194 was blazed as a migration route in the 18th century and a pair of turnpikes in Frederick County in the 19th century , one of which was the last private toll road in Maryland . The state highway , which was originally designated MD 71 , was built as a modern highway in Frederick County in the mid @-@ 1920s and constructed as Francis Scott Key Highway in Carroll County in the late 1920s and early 1930s . MD 194 received its modern route number in 1956 as part of a three @-@ route number swap . The state highway 's bypasses of Walkersville and Woodsboro opened in the early 1980s and mid @-@ 1990s , respectively . 
