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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.
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.
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.
Next up are MD 180 and MD 351, which parallel US 15 and US 340.
The US 340 expressway, also known as the Jefferson National Pike, ends in Frederick at US 40.
The last reassurance shields for eastbound US 15/US 340.
At the next interchange, exits appear for I-70 west and US 15 north. Both lead to US 40 duplexes.
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.
Now looking westbound at the beginning of the US 15/US 340 duplex. First is the exit for US 15/US 40.
The other ramp of this interchange is for US 40 alone.
MD 180 and MD 351 exit next.
Reassurance shields westbound on the duplex.
The next interchange leads not to I-70, but to rural Mount Zion Road.
Signs for the western split, where this journey began.
The US 15/US 340 western split.
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.
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.
Here at the southern split cloverleaf of US 15/US 40, US 15/US 340 begins at the first exit.
Gore-point signs for the US 15/US 340 exit. US 40 next merges onto I-70 while I-270 begins.
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