With a total length of over 200 miles (320 km), it is the longest numbered highway in Maryland. Almost half of the road overlaps with Interstate 68 or Interstate 70, while the old alignment is generally known as U.S.Route 40 Alternative, U.S. Route 40 Scenic, or Maryland Route 144. West of Baltimore, the portions where it does not overlap an Interstate highway are mostly two-lane roads. The portion east of Baltimore is a four-lane divided highway, known as the Pulaski Highway, except for the two-lane Thomas J. Hatem Memorial Bridge, a toll bridge over the Susquehanna River.
From Cumberland west to Pennsylvania, US 40 is the successor to the historic National Road. East of Cumberland, towards Baltimore, US 40 follows several former turnpikes, most notably the Cumberland Turnpike and Baltimore and Frederick-town Turnpike. The route from Baltimore northeast to the Delaware state line follows another historic corridor towards Philadelphia, including the old Baltimore and Havre-de-Grace Turnpike (now mostly bypassed as Maryland Route 7).
To claim this cache, you will need a logging password. You will need to find the sign that says "Town Hill Overlook, The Beauty Spot of Maryland." Find the last section that starts off "The Town Hill Hotel was one of the first to cater to the 20th century..." What did that cater to? It is in quotations. The password is the first word in quotations in small letters.