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Suggested restrictions for Australian slip base sign posts.

Heglund, K

General

2008

There is a considerable amount of evidence that slip base posts don't work as designed in certain applications. These include on filled slopes and where a post may be hit by a vehicle at an angle outside the design parameters of the post. Road Safety Barriers are assessed and limitations are placed on their installations. Some restraints placed on barrier installations include the batter must be less than 1:10 and the barrier must be at least 200mm behind the face of a kerb. A similar process should be used for sign supports.