Take Exit 12 (Carteret). Turn right onto Roosevelt Avenue (which turns into Randolph Ave.) and follow until the end. Turn right onto Woodbridge Road. This road turns into Lawrence Avenue. Travel straight across Route 1 to the end. At the blinking light, turn right onto Grand Avenue. Make first left turn onto Montgomery Street. Just before the end of the street, turn left into the Visitor parking area. Merck's main gate is on E. Scott Ave across from the parking lot. Proceed to the North corner of the lot and cross the street at the traffic light. Enter the guard house on the right and check in.

Take Exit 13 to Routes 1 & 9 South. Follow into Rahway. Turn right at Merck sign onto Scott Avenue. Make a left turn onto the fourth street, Montgomery Street. Turn right into the Visitor parking area. Merck's main gate is on E. Scott Ave across from the parking lot. Proceed to the North corner of the lot and cross the street at the traffic light. Enter the guard house on the right and check in.

Take Exit 135 (Clark exit). Follow signs for Brant Avenue and Rahway. Make a left at the light onto Westfield Avenue. Proceed to St. Georges Avenue and turn left. At the first light, make a right onto W. Scott Avenue. Go through 2 traffic lights, under railroad overpass. Make a right turn onto the first street, Montgomery Street. Turn right into the Visitor parking area. Merck's main gate is on E. Scott Ave across from the parking lot. Proceed to the North corner of the lot and cross the street at the traffic light. Enter the guard house on the right and check in.

Take Route 1 North. Make a right onto East Grand Avenue (Kentucky Fried Chicken is on the right). Take first left and cross over Route 1 staying on East Grand Avenue. Turn left at first stop sign. Make right onto Montgomery Street. Just before the end of the street, turn left into the Visitor parking area. Merck's main gate is on E. Scott Ave across from the parking lot. Proceed to the North corner of the lot and cross the street at the traffic light. Enter the guard house on the right and check in.

Take Route 1 & 9 South. Continue about 7 miles to Rahway. Turn right at Merck sign onto Scott Avenue. Make a left turn onto the fourth street, Montgomery Street. Turn right into the Visitor parking area. Merck's main gate is on E. Scott Ave across from the parking lot. Proceed to the North corner of the lot and cross the street at the traffic light. Enter the guard house on the right and check in.

Take the Northeast Extension of the PA Turnpike to Exit 31 (Lansdale). Turn left at end of ramp onto Sumneytown Pike. Travel east on Sumneytown Pike through 6 traffic lights. At the 7^th traffic light, make a right onto Broad St. At the next traffic light, make a right into Gate 9. At the next stop sign, make a left. Across from the front of the building is visitor parking. Park, then enter the main lobby and check in with the guard.

Take PA Turnpike to Exit 26 (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 and through one traffic light. At the next traffic light, make a left onto Broad Street. At the next traffic light, make a right into Gate 9. At the next stop sign, make a left. Across from the front of the building is visitor parking. Park, then enter the main lobby and check in with the guard.

Take Route 202 to Sumneytown Pike West. (William Penn Inn is at the corner of this intersection.) Continue through Gwynned and North Wales (Sumneytown Pike is called Main Street in North Wales). Go under a railroad overpass and through one traffic light. At the next traffic light, make a left onto Broad Street. At the next traffic light, make a right into Gate 9. At the next stop sign, make a left. Across from the front of the building is visitor parking. Park, then enter the main lobby and check in with the guard.

Upon leaving the 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. Turn left at end of ramp onto Sumneytown Pike. Travel east on Sumneytown Pike through 6 traffic lights. At the 7^th traffic light, make a right onto Broad St. At the next traffic light, make a right into Gate 9. At the next stop sign, make a left. Across from the front of the building is visitor parking. Park, then enter the main lobby and check in with the guard.

Take Route 76 West to Route 476 (toll road) North. Travel north on Route 476 to the toll plaza. Bear to the left to take 476 North (toward Allentown). Travel approximately 10 miles to Exit 31, Lansdale. Turn left at end of ramp onto Sumneytown Pike. Travel east on Sumneytown Pike through 6 traffic lights. At the 7^thtraffic light, make a right onto Broad St. At the next traffic light, make a right into Gate 9. At the next stop sign, make a left. Across from the front of the building is visitor parking. Park, then enter the main lobby and check in with the guard.