Question: How long is the route that connects Philadelphia to Lehigh County?

Pennsylvania Route 863 (PA 863) is a state highway in Lehigh County, Pennsylvania.  The route runs 13.99 mi from U.S. Route 222 (US 222) in Upper Macungie Township north to PA 143 in Lynn Township.  The route is a two-lane undivided road that runs southeast-northwest through rural areas in western Lehigh County.  Along the way, PA 863 has an interchange with Interstate 78 (I-78)/US 22 in Weisenberg Township.  The road was originally unpaved, being improved to a bituminous road by the 1940s and a paved road by 1950.  PA 863 was designated in the 1960s. <SEP>  The route runs from the interchange between PA 611 and Cheltenham Avenue on the border of Philadelphia and Cheltenham Township north to an intersection with PA 29 in Bowman Creek, a village in Monroe Township, Wyoming County.  It connects Philadelphia and its northern suburbs to Allentown, Hazleton, and Wilkes-Barre.  A limited-access highway portion of PA 309 in the Wilkes-Barre area is known as the North Cross Valley Expressway.  A limited-access highway portion of PA 309 in Montgomery County is known as the Fort Washington Expressway.  PA 309 parallels the newer Interstates 476 and 81 for much of its length. Pennsylvania Route 309 (PA 309) is a major highway which runs for 134 miles (216 km) through Pennsylvania in the United States. <SEP> Pennsylvania Route 145 (PA 145) is a 20.89 mi long north–south state highway in the Lehigh Valley area of eastern Pennsylvania.  It connects Interstate 78 (I-78) and PA 309 in Lanark, Lehigh County to PA 248 in Weiders Crossing, Northampton County.  PA 145 is the main north-south arterial into Allentown, the third-largest city in the state.  The route enters the city on South 4th Street and follows multiple streets to downtown, where it follows the one-way pair of 6th Street northbound and 7th Street southbound.  North of Allentown in Whitehall Township, a seven-mile (11.2 km) portion of PA 145 is known as MacArthur Road, named in honor of General Douglas MacArthur.  MacArthur Road is a divided highway; between U.S. Route 22 (US 22) and Eberhart Road, it is six lanes wide with a Jersey barrier and jughandles while the remainder of the road a four-lane divided highway.  MacArthur Road is the location of the main commercial center of the Lehigh Valley.  North of Eagle Point, PA 145 becomes a two-lane undivided road that parallels the Lehigh River, crossing the river into Northampton County at Treichlers.  The route continues along the east bank of the river and passes through Walnutport before reaching its northern terminus.  PA 145 is dedicated as the Battle of the Bulge Veterans Memorial Highway in honor of the veterans who fought in the Battle of the Bulge. <SEP>  It is Pennsylvania's third most populous city and the 224th largest city in the United States.  As of the 2010 census, the city had a total population of 118,032 and is currently the fastest growing city in all of Pennsylvania.  It is the largest city in the metropolitan area known as the Lehigh Valley, which had a population of 821,623 residents as of 2010 . Allentown (Pennsylvania Dutch: "Allenschteddel") is a city located in Lehigh County, Pennsylvania, United States.  Allentown constitutes a portion of the New York City Combined Statistical Area and is the county seat of Lehigh County.  In 2012, the city celebrated the 250th anniversary of its founding in 1762.