080626 FINAL Traffic Report version 2.pdf [As Published] · 132008.1128

Blue Care Property Development Unit                                                        Blue 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.
                       ƒ    Ben Lexcen Drive / Grasstree Court / Lipton Street; and
                       ƒ    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 will 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.
                 95th %ile Queue – A queue length measured in metres for which only 5% of queues are
                 equal to or greater than this length.




J:\86000\86512\66\DOCUMENTS\REPORTS\REPORT             Page 13                                                     Arup
TITLE\FINAL\0002REPORT_JUNE08_V2.DOC                                                               Issue   24 June 2008