Coming along the N1

Take the Rivonia Road off ramp heading towards sandton city
(turn left off the N1 South).
Turn left into school road
(there will be an engen petrol station on your right).
At the T-junction turn right into Middle Road.
At the stop street turn left into Centre road.
The Lab will be immediately on your right (Number 30). 

Coming along the M1

Take the Grayston road off ramp and turn left onto Grayston drive (right if you are coming from pretoria)  heading towards Rivonia road.
Carry on Grayston until you reach an intersection with a Mac Donalds infront of you on your right. This will be Rivonia road.
Turn right into Rivonia road and continue on Rivonia road past the Morningside clinic. You will then pass a shell garage on your left hand side.
At the next set of traffic lights turn right into Centre road.

OR

Take the Marlboro drive offramp and turn left (right if you are coming from pretoria). At the T-junction turn right into Bowling road.
At the second traffic light turn left into South road.
Continue on South road and turn right into Middle road. 
At the stop street turn right into Centre road.
The Lab will be immediately on your right (Number 30).
Note: If you miss Middle road continue on South road and turn right into Rivonia road. At the next traffic light turn right into Centre road.