For solo/couples travelling light take the #62 bus to Newark (not the one to Elizabeth) from bus stop #8 outside terminal B (follow ground transportation signs). They are every 30 mins, costs $1.60 & takes 20 mins to Newark Penn Station ( bus terminates here). In the station go to track 1 & buy a PATH ticket $2.75 & go through the barrier to the right side of the platform. Trains to World Trade Centre every 20 mins & takes about 10 mins. At WTC connect with NYC subway.