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US 15(N-S)/US 340(E-W) Duplex

US 15 and US 340 join for a 5.0-mile duplex on the Jefferson National Pike freeway from Frederick to Catoctin Point in Frederick County.

Timothy Reichard 1/13/03

Northbound on US 15 as its lane split and merge with US 340 eastbound. To get to US 340 westbound, one must take the first exit.

Timothy Reichard 1/13/03

The second exit on US 15/US 340 is for I-70 eastbound, which leads to I-270 and the lengthy I-70/US 40 duplex.

Timothy Reichard 1/13/03

Next up are MD 180 and MD 351, which parallel US 15 and US 340.

Timothy Reichard 1/13/03

The US 340 expressway, also known as the Jefferson National Pike, ends in Frederick at US 40.

Timothy Reichard 1/13/03

The last reassurance shields for eastbound US 15/US 340.

Timothy Reichard 1/13/03

At the next interchange, exits appear for I-70 west and US 15 north. Both lead to US 40 duplexes.

Timothy Reichard 1/13/03

At the end of the expressway, US 15 makes a left turn onto the US 15/US 40 Frederick expressway bypass. US 340 might end here, or it might end at MD 144 in downtown Frederick.

Timothy Reichard 1/13/03

Now looking westbound at the beginning of the US 15/US 340 duplex. First is the exit for US 15/US 40.

Timothy Reichard 1/13/03

The other ramp of this interchange is for US 40 alone.

Timothy Reichard 1/13/03

MD 180 and MD 351 exit next.

Timothy Reichard 1/13/03

Reassurance shields westbound on the duplex.

Timothy Reichard 1/13/03

The next interchange leads not to I-70, but to rural Mount Zion Road.

Timothy Reichard 1/13/03

Signs for the western split, where this journey began.

Timothy Reichard 1/13/03

The US 15/US 340 western split.

Timothy Reichard 8/25/02

Now some views along US 40. The US 15/US 340 duplex begins here at the beginning of US 15/US 40, northbound on the Frederick Freeway.

Timothy Reichard 1/13/03

Southbound on the Frederick Freway, US 40 has just merged onto US 15 as US 15 prepares to exit onto the US 340 Jefferson National Pike.

Timothy Reichard 8/25/02

Here at the southern split cloverleaf of US 15/US 40, US 15/US 340 begins at the first exit.

Timothy Reichard 8/25/02

Gore-point signs for the US 15/US 340 exit. US 40 next merges onto I-70 while I-270 begins.

Local Names

North	Frederick Freeway
Duplex	Jefferson National Pike
South	Catoctin Mountain Highway
West	Jefferson National Pike

Terraserver Imagery

• 1970 Topo. · US 15/US 340 western split
• 1993 Topo. · US 15/US 340 eastern split
• 1988 Aerial · US 15/US 340 western split
• 1988 Aerial · US 15/US 340 eastern split
• US 15 Interchange Browser

Adjacent Multiplexes