I assume the "new highway" is the new part of rt 33, between 22 and 78.
From Wind Gap to Somerville your exits would be:
Route 33:
Henry Road - Belfast (Access to jacobsburg park)
191 - Stockertown, and some Northern Parts of Nazareth
248 - Southern Nazareth, Wegmans, Walmart Parts of Palmer Township
Hecktown Road - Mostly Car Dealerships, Palmer Township
22 - Major road from somewhere in OH to Newark
William Penn Highway, Bethlehem Township
Freemansburg Ave, Bethlehem Township, some new sprawl crap
78 - Interstate from Harrisburg to New York
I-78:
Morgan Hill Road, Access to 611, South Easton
---Entering NJ (see the rest here
Interstate 78 in New Jersey - Wikipedia, the free encyclopedia
To go to somerville, you'll want to get off at exit 18 and take 22 in