Upon leaving Airport, travel south on Route 95 to Exit 7, Plymouth Meeting/Route 476 (toll required).
Travel North on Route 476, approximately 20 miles to Pennsylvania Turnpike.
Take the Northeast Extension of the PA Turnpike (Route 476) to Exit 31, Lansdale/Kulpsville.
At the turnpike exit traffic light, turn left onto Sumneytown Pike.
Travel east on Sumneytown Pike through 5 traffic lights.
At the sixth traffic light, make a right into the Merck facility.
(Approximate driving time from Philadelphia Airport to West Point Merck Site is one hour)

Take Route 78 East to the New Jersey Turnpike South.
Travel south on the New Jersey Turnpike to Exit 6, Pennsylvania Turnpike Connection.
Travel west on Pennsylvania Turnpike Connection to exit 333, Northeast extension/Route 476. (Travel time to this point is approximately 75 minutes)
Travel north on Route 476 to Exit 31, Lansdale/Kulpsville.
At traffic light, turn left onto Sumneytown Pike.
Travel east on Sumneytown Pike through 5 traffic lights.
At the fifth traffic light, make a right into the Merck facility.

OR

Take Route 78 East to the New Jersey Turnpike South.
Travel south on the New Jersey Turnpike to Exit 6, Pennsylvania Turnpike Connection.
Take PA Turnpike West to exit 339 (Fort Washington) to Route 309 North.
Exit Route 309 at Norristown Road/Springhouse.
Turn left at the end of the ramp onto Norristown Road. This becomes Sumneytown Pike.
Cross over Route 202. (The William Penn Inn is on this corner.)
Continue through Gwynned and North Wales (Sumneytown Pike is called Main Street in North Wales).
Go under a railroad overpass.
At the next traffic light, make left into the Merck facility.