Appendix D. Traffic Report

                                                                           Proposed Service Station, 175 Eumundi Noosa Road, Noosaville




To test whether the proposed development would create a large enough traffic impact along Eumundi Noosa
Road and two surrounding roundabouts, the ‘new’ trips generated by the proposed service station (MRCagney
Figure C5, Appendix C) were compared to the base traffic volumes along Eumundi Noosa Road travelling
westbound in the opening year of the site (MRCagney Figure C1 and C2, Appendix C). This is the volume of
traffic entering the first roundabout surveyed.

The 2019 base traffic volumes, the ‘new’ OUT trips generated by the proposed development and the subsequent
percentage increase in traffic volumes are shown in Table 4-3 below.

Table 4-3: Percentage Increase in Traffic Volumes

                            2019 Base Volumes along                  ‘New’ OUT trips generated along
                                                                                                               Percentage Increase
      Peak Period         Eumundi Noosa Road Travelling               Eumundi Noosa Road Travelling
                                                                                                                in Traffic Volumes
                               Westbound (vph)                              Westbound (vph)

     Weekday AM                           1153                                         4                               +0.3%

     Weekday PM                           1543                                         8                               +0.5%

As indicated in Table 4-3, the traffic likely to be generated by the proposed development will have an
insignificant impact on the operation of the external road network during the weekday AM and PM peak hour
periods, with the additional traffic generated by the proposed development expected to be substantially less
than 5% of the 2019 base traffic volumes for the westbound carriageway of Eumundi Noosa Road. Notably,
even with a higher proportion of primary trips, the increase in traffic flow would still be less than 5%.

It is therefore reasonable to conclude that the proposed service station does not warrant an assessment of the
operational performance of the Eumundi Noosa Road / Rene Street / Gateway Drive roundabout and the
Eumundi Noosa Road / Eenie Creek Road / Eumundi Road / Commercial Access roundabout.

4.5           Turning Warrants Assessment - Eumundi Noosa Road
Although the proposed development does not generate sufficient traffic volumes to warrant an assessment of
its external traffic impact, it is necessary to assess whether an auxiliary turn lane treatment is warranted at the
Eumundi Noosa Road site access. Applying the critical traffic scenarios (2019 AM and PM design scenarios)
ensures the warrants for the left-turn treatment of the Eumundi Noosa Road ingress are assessed against peak
traffic conditions.

It is noted that the posted speed limit of the eastbound carriageway of Eumundi Noosa Road is 60km/h
approaching the site. The warrants of the proposed site ingress for left-turn lane treatment are determined by
plotting the expected traffic volumes on the ‘warrant graphs’ included in Austroads’ Guide to Road Design Part
4A: Unsignalised and Signalised Intersections7. The relevant Austroads graph is Figure 4A-1(c) Warrants - Major
Road Turn Treatments - Normal Design Domain, Design Speed ≤70km/h, replicated as Figure 4-2 below.




7
    “Guide to Road Design Part 4A: Unsignalised and Signalised Intersections” and “Supplement to Austroads Guide to Road Design Part 4A:
Unsignalised and Signalised Intersections”, Austroads.




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