When cars became more popular the inconsistency of road sign design meant they were unnoticed. There therefore had to be a change and standardisation.
Road signs can be categorised in certain ways, above shows some of these.
Mandatory:- These signs are usually circular and red. They contain a graphic that is easy to see at high speed.
Cautionary:- These sings are usually triangular with a red border and contain a graphic in the centre that further explains the caution but is simple enough to be read at speed.
Informatory:- These sings provide details about the road ahead.They are usually blue (motor way) or green (A roads) with white writing. The designers discovered that these two colours with white writing were the best and easiest to understand at high speed.
Across the world the UK standard has spread and the font 'Transport' is used.
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