11347 Traffic Engineering Report - Poultry Farm- Cooroy (RFI August 2013)

                                                            Traffic Engineering Report 11347
                                                          MCU: Agricultural Use Poultry Farm
                                                                              Milligan Farms
                                                                                 August 2013



5.       TRAFFIC IMPACT

The assessment of the impact of the proposed development on the external road
network has been undertaken. The impact has been analysed according to the
procedures set out in Austroads – Guide to Traffic Management and Road Design.


5.1      Intersection Analysis (without development)

A review of the operational performance of the intersection of the Old Ceylon Road
and Cooroy Belli Creek Road has been undertaken. According to Austroads Guide to
Traffic Management Part 3 – Traffic Studies and Analysis, Table 6.1, “At
unsignalised intersections with minor roads where there are relatively low volumes of
cross and turning traffic, capacity considerations are usually not significant and
capacity analysis is unnecessary”. Table 6 below shows the volumes where
intersections operate adequately and capacity analysis is not required.

                            Table 6 - Roadway Capacity
                                       Light cross & turning volumes
                   Type of Road        Maximum design hour volumes
                                        Vehicles per hour (two way)
                Two Lane major road     400        500         650
                    Cross road          250        200         100

The traffic volumes on Cooroy-Belli Creek Road as stated in Table 1 of this report are
below 200 vehicles per hour and the estimated volumes on Old Ceylon Road are also
below 200 vehicles per hour. Therefore the intersection will continue to operate
under uninterrupted flow conditions and detailed analysis is considered unnecessary.


5.2      Road Section Analysis (with development)

The impacts of the proposed development on Cooroy-Belli Creek Road have been
assessed. In accordance with the requirements of Austroads and the Main Roads
document, “Guidelines for Assessment of Road Impacts of Development Proposals.”
it states in Section 1.2 Scope of the Guidelines;

     “In general terms, a development’s road impacts are considered to be
     insignificant if the development generates an increase in traffic on the road
     network of less than 5% of existing levels.”

According to the traffic surveys the existing levels or average annual daily traffic
volume (AADT) on Cooroy Belli Creek Road is 511 vehicles per day (vpd). The
increase in development traffic is 4 vpd. Compared to existing levels the trips
generated from the site are below 5%. Therefore the increase in development
generated traffic would be less than 5% of existing levels and the impact is considered
insignificant.



                                                                                    Page 11