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4.5.2 Normal Roundabouts
4.5.2.1 Normal roundabouts encompass a large range of central island
sizes including both of what formerly were referred to as small
roundabouts and conventional roundabouts. The long parallel
sided weaving sections, required before the offside priority
rule was introduced, have now been replaced with shorter wider
sections and much greater importance is attached to the geometry
of the entry. The revised geometrical requirements effectively
result in a much reduced land take when compared with the former
designs and this fact is of particulars significance in the
Territory where land prices are high.
4.5*2.2 The number of entries recommended for a normal roundabout is
three or four* Roundabouts perform particularly well with three
entries and balanced traffic flows. If the number of entries is
greater than four, driver comprehension is affected and the
roundabout becomes larger with the probability that higher
circulatory speeds will be generated. In these circumstances
double roundabouts should be considered as a potential solution.