08/1128 - Response to Information Request [As Published] · 132008.1128

Blue Care Property Development Unit Biue Care Sunrise Beach
: Traffic impact Assessment

 

4.4 Intersection Analysis

 

Based upon the background and development traffic volumes in 2019 (predicted in sections
4.1 and 4.3 of this report respectively), it is estimated that traffic generated by the subject
site will only increase traffic through the Ben Lexcen Drive / Eenie Creek Road / Heathland
Drive intersection by approximately 2.4% in the AM peak period and 4.6% in the PM peak
period. Given the low impact of development-related traffic, detailed intersection analysis is
not considered warranted. This approach is supported by the Department of Main Roads’
Guidelines for Assessment of Road Impacts of Development.

As such, detailed intersection analysis has been undertaken for the following intersections
only.

* Ben Lexcen Drive / Grasstree Court / Lipton Street; and
= Ben Lexcen Drive / Girraween Court.

Detailed analyses of these intersections have been undertaken by superimposing the
predicted site generated traffic volumes and background traffic volumes for the 2019 design
scenario (for both the morning and evening peak periods).

It has been assumed that the geometry of the two intersections in 2019 witl be the same as
those currently in operation (i.e. both will be single lane roundabouts with single lane
approaches and exits).

The results of these analyses have been summarised in tabular form below. Each table
makes reference to three intersection performance criteria. A description of each follows:

Degree of Saturation (%) — This is the ratio of demand flow to capacity.

Average Delay (sec) - The average delay per vehicle in seconds incurred by vehicles over
the modelled time period.

95" %ile Queue — A queue length measured in metres for which only 5% of queues are
equal to or greater than this length.

 

JABEOOO\W8ES 1 2166\DOCUMENTSIREPORTSIREPORT Page 13 Arup
TITLE\FINAL\O0O2REPORT_JUNEO8_V2.00C Issue 24 June 2008