20517 App L.pdf [As Published] · 132007.1259

CJ Cardno

Essence of Peregian Beach Eppell Olsen

 

5.6 Traffic Impacts

As indicated earlier, the following study intersections have been identified for assessment:

. David Low Way/Heron Street/hotel access;
. David Low Way/unnamed access road.

Each of these intersections has been analysed for each of the scenarios outlined above using
the SIDRA3.1 analysis programme. This programme calculates the operation of intersections
based on input parameters, including geometry and traffic volumes. As an output SIDRA3.1
provides values for the degree of saturation (DOS), queues and delays. The DOS is a
commonly used value, which is essentially a volume to capacity ratio. The typically adopted
upper limits for the DOS, where it is considered that the operation of the intersection is
constrained, are: :

. unsignalised intersection: 0.80;
. roundabouts: 0.85.

A DOS exceeding these values indicates that the intersection is nearing its operational
capacity. Above these values, users of the intersection are likely to experience unsatisfactory
queuing and delays.

The following summarises the analysis of the nominated intersections.
5.6.1 David Low Way/Heron Street

This intersection is a single lane roundabout, at which the development traffic flows on the
through movement are likely to exceed the 5% rule. The operation of this intersection has
been assessed for both a background and a with development traffic situation. This is for the
purposes of identifying the impact which the development is likely to have on the intersection
operation.

The results of this analysis are provided at Appendix D and are summarised in Table 5.2.

 

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