Advance Direction Stack Signs ADS
ADS Stack Signs only indicate the general direction a motorist must take to travel towards the destination shown, they do not necessarily show the exact geometric layout of the intersection.
Advance Direction Map Signs ADS
ADS Map signs are generally installed on all approaches of a complicated or major roads intersection(s), and large roundabouts showing destinations and a pictorial of the intersection.
Confirmation Direction Signs - CD
Confirmation Direction Signs are normally installed on the road leading away from a major intersection providing information on upcoming destinations (normally with distances) and confirmation to the driver that they have taken the correct path.