3DIRECTIONAL INFORMATORY SIGNS - GENERAL PRINCIPLES
TYPES OF DIRECTIONAL SIGNS
3.1 Directional informatory signs can be categorised as follows:
(a) Advance Direction Signs - those signs giving route information in respect of a junction ahead.
(b) Direction Signs - those signs placed at a junction and pointing along specific routes.
(c) Route Confirmatory Signs - those signs placed after a junction giving confirmation as to the route being followed and, in most cases, destinations that can be reached, together with the appropriate distances.
3.2 Advance direction signs can be either post mounted or gantry mounted. They are sited on the approach to the junctions indicated to give drivers adequate advance warning. There are three types of post mounted signs: map type, stack type and dedicated lane signs. An example of each is illustrated in figure 3-1. Gantry mounted signs are generally used for grade separated junctions. There are two distinctive designs; one for junctions without lane drops and one for junctions with lane drops. It is vitally important that the correct design is used for the two different types of junction. An example of each design is illustrated in figure 3-2.
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