Play with the numbers in the array to get the direction you want. The three components are east-west, north-south and up-down. The bigger the numbers, the faster he goes. As you have already discovered,
[0,-60,0] is south
[50,0,0] is probably east
[-90,90,0] might be north west
and so on. So once you have found the bit of road, just play with the numbers till it looks right.
What problems are you having with the trigger?