Attachment 5 - Traffic Impact Assessment Final PTT · 132005.638.06

         2.5.4        Data Application
         As discussed, there are three main datasets that have been used for this assessment. All three
         datasets represent different months of the year and different observation periods (eg three weeks
         of tube counts compared to two 3-hour peak periods for the traffic counts). As such, there is
         some variation in observed peak hours and volumes. The application of each dataset is
         summarised below:

         —        The weighbridge dataset provides an understanding of the relationship between vehicles
                  entering the site and the type and quantity of waste delivered. This has been used to inform
                  queuing at the weighbridge and quantify monthly trip generation rates for the site in
                  vehicles per tonne.

         —        The tube counts capture three weeks of site access operations. These data have been used
                  to determine the typical weekday and weekend peak hours, peak arrival rates and
                  average vehicle lengths. This has been used to quantify queuing and to convert the
                  monthly traffic generation to peak hour values.

         —        The turning movement surveys reflect traffic volumes on the external road network and
                  the distribution of existing traffic generated by the site (eg the north/south split of NRRC
                  traffic on this road). This has been used to assess the site access operations and to inform
                  the trip distribution of the additional traffic generated by the proposed development.

2.6      QUEUING

         2.6.1        Existing Conditions
         The NRRC has a single weighbridge to weigh both inbound and outbound vehicle movements.
         It is located approximately 155m from the site access. Council have advised that queuing from
         the weighbridge sometimes extends onto Eumundi Noosa Road. Queuing from the weighbridge
         also blocks access to other on-site facilities, such as the Reviva Shop and offices.

         The 95th percentile queue at the weighbridge has been calculated using queuing theory, as
         outlined in Section 4.4.1 of Austroads Guide to Traffic Management: Part 2 (2026), based on
         the following assumptions:

         —        peak arrival rates (Table 2.3):

                  —       Tuesday:       93vph
                  —       Sunday:        87vph

         —        weighbridge service time of 30s per vehicle (Section 2.5.1, the higher service time has
                  been adopted for a more conservative assessment)

         —        average spacing between queuing vehicles of 3.2m (NearMap survey)

         —        average vehicle length during peak hours (Table 2.3):

                  —       Tuesday:       6.7m
                  —       Sunday:        6.2m




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