US 340 and 40 in Maryland

By | October 29, 2022

US 340 in Maryland

US 340
Get started weaverton
End Frederick
Length 18 mi
Length 27 km
West Virginia






Mount Zion Road

According to Existingcountries, US 340 is a US Highway in the US state of Maryland. The road forms an east-west route in the middle of the state and is almost entirely a freeway. The road branches off US 40 and ends in Frederick. The road is 27 kilometers long.

Travel directions

At Weverton, single – lane US 340 in Virginia crosses the Potomac River and enters Maryland. The road then becomes a 2×2 lane highway and then heads east along the Potomac River and later further away from the river. The area consists of meadows and rolling fields with the occasional wooded ridge. Just past Jefferson, US 15 merges from Leesburg, Virginia. US 340 ends at US 40 in Frederick, right after the interchange with Interstate 70. US 15 then continues as a highway through Frederick toward Harrisburg, Pennsylvania.


US 340 used to run on what is now parallel State Route 180 before the highway was built in the 1970s.

Traffic intensities

Some 24,000 vehicles cross the Virginia border every day, rising to 54,000 vehicles in Frederick.

US 40 in Maryland

US 40
Get started Keysers Ridge
End Elkton
Length 221 mi
Length 356 km

Keysers Ridge







Frederick – Baltimore:


White Marsh



Havre de Grace



According to Anycountyprivateschools, US 40 is a US Highway in the US state of Maryland. The road forms an east-west route through the north of the state and runs from the Pennsylvania border in the west of the state through Hagerstown, Frederick and Baltimore to the Delaware border in the east of the state. Much of the route is double -numbered with Interstate 68 and Interstate 70. At 356 kilometers, US 40 is Maryland ‘s longest route.

Travel directions

I-68 and US 40 in western Maryland.

US 40 between Hagerstown and Frederick.

Northwest of Keysers Ridge, US 40 in Pennsylvania enters the state of Maryland from Uniontown in a highly hilly area about 800 meters above sea level. The road then runs to the village and merges with Interstate 68, the highway from Morgantown in West Virginia. The US 219 from Elkins also inserts here, so that a triple numbering is created. At Grantsville, US 219 exits again to Johnstown in Pennsylvania. US 40 is then double -numbered for the rest of Interstate 68, up to Hancock, 110 kilometers to the east. One passes through the town of Cumberland, where the US 220and at Hancock, US 40 becomes Interstate 70 from Pittsburgh. From Indian Spring, 15 kilometers further, US 40 continues on a separate route next to I-70. The road then leads through Hagerstown, a regional town where Interstate 81 crosses. One also crosses the US 11, which runs parallel to it.

From Hagerstown, the road heads southeast to Frederick, also parallel to Interstate 70. The US 40 Alternate takes a slightly longer parallel route. In Frederick one crosses the highway US 15. On the south side of Frederick, US 40 rejoins Interstate 70 at the interchange where Interstate 270 to Washington begins. The US 40 is then double-numbered for a kilometer or 40 with I-70 up to Alpha, where the US 40 forms a 2×2 divided highway parallel to I-70. One then enters the metropolitan area around Baltimore and at the suburb of Ellicott City one crosses US 29. The US 40 is called theBaltimore National Pike and is an important underlying link. At Catonsville, one crosses the Baltimore ring road, Interstate 695. It then enters the city of Baltimore itself and the road then forms Edmondson Avenue, which has 2×3 lanes. From Franklin Street, US 40 becomes a 2×3 lane deepened highway, a remnant of the days when I-70 would still be extended to downtown Baltimore. Now it is an isolated stretch of highway without much transport value. This part of the highway is only over a kilometer long, but it saves 10 intersections. It also crosses US 1, which curves around downtown.

US 40 itself runs right through downtown Baltimore, after which the 6-lane road crosses Interstate 83. There is no direct connection to the motorway. The US 40 runs here elevated over a long viaduct. Then US forms 40 Orleans Street, a 2×2 divided highway. One comes here through Baltimore’s old neighborhoods, with numerous row houses and mansions. In the east of the city it connects with Interstate 895, a bypass for Baltimore. Shortly afterwards, the connection with Interstate 95 follows. US 40 then continues northeast through the suburban area, with 2×2 lanes. At Rosedale, the connection with theInterstate 695, the beltway. You then pass through fragmented industrial areas with some residential areas. Here are some distant suburbs in the countryside. Only after Edgewood one enters a somewhat quieter part of Maryland. The road here parallels I-95 and Chesapeake Bay with 2×2 lanes. At Havre de Grace one crosses the mouth of the Susquehanna River and follows the last 25 kilometers to the border with Delaware. At Elkton, the road crosses the border into Delaware and US 40 continues in Delaware to Wilmington.


The Thomas J. Hatem Memorial Bridge over the Susquehanna River.

The road was part of National Road, a road that ran from Cumberland to Wheeling in West Virginia in 1810. Later, the part to Baltimore, the Cumberland Turnpike, was added. In the 19th century, US 40 consisted mainly of turnpikes, predecessors of the US Highway system. US 40 was created in 1926. In August 1940, the Thomas J. Hatem Memorial Bridge opened over the Susquehanna River at Havre de Grace. This replaced a bridge from 1910.

Between 1950 and 1955, I-70 opened between Frederick and Baltimore, over which US 40 was routed. Between 1957 and 1991, the US 40 freeway was built, which would later be numbered Interstate 68, along with US 40.

Traffic intensities

Every day, 38,000 vehicles drive east of Baltimore to White Marsh and 28,000 vehicles east of it. The rest of the route to Elkton has 25,000 to 35,000 vehicles.

US 40 in Maryland