8. Appendix D - Traffic Engineering Report

                                                             Traffic Impact Assessment Report
                                                               Wedding Venue, Ringtail Creek
                                                                        For Louis Bazzo Pty Ltd
                                                                                     June 2024


6       SITE ACCESS

An assessment of the sight visibility at the proposed access has been undertaken. Sight
distance has been assessed from the proposed access driveway in accordance with
Austroads Guide to Road Design Part 4A. The posted speed limit of Louis Bazzo Drive
is 80km/h.

The following sight distance criteria applies for the proposed access intersection.
    MGSD – Minimum Gap Sight Distance for the critical right turn movement
    SISD – Safe Intersection Sight Distance
    SSD –Stopping Sight Distance (minimum criteria)

Normal Design Domain has used the following:
    Observation time (OT) of 3 seconds (Clause 3.2.2 of Austroads Part 4A)
    Reaction time (RT) of 2 seconds (Table 5.2 of Austroads Part 3)
    Coefficient of longitudinal deceleration of 0.36 (Table 5.3 of Austroads Part 3)

Extended Design Domain has used the following:
    Observation time (OT) of 1.5 seconds (Table A8 of Part 4A)
    Reaction time (RT) of 2 seconds (Table A5 of Austroads Part 3)
    Coefficient of longitudinal deceleration of 0.46 (Table A6 of Austroads Part 3)

                 Table 3 - Austroads Sight Distance Criteria 90km/h
       Posted 80km/h & Design Speed of 90km/h           MGSD      SISD             SSD
       Normal Design Domain (NDD) OT=3s RT=2s           125m 214m                 139m
     Extended Design Domain (EDD) OT=1.5s RT=2s                  157m             119m

The proposed access intersection location has been assessed in regard to sight
visibility and geometry. A site inspection was undertaken on to measure sight
distances from the proposed intersection location and results provided in Table 3.

                       Table 4 - Sight distance measurements
    Intersection    Sight distance to/from         Sight distance to/from south
      Location             north
       Access                240m                      96m (160m possible)
                                                (impeded by overgrown vegetation)

The proposed/existing access location complies with the requirements for a design
speed of 90km/h to and from the west, however sight visibility to the east is
constrained by vegetation and the verge embankment. With vegetation removal and
benching the EDD criteria for 90km/h can be met, to comply with requirements for an
access.




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