Traffic Engineering Report

5.2.           Daily Traffic
DTMR also provided projections of daily traffic volumes for the Cooroy Interchange. Notes on
the volume diagrams identify that the volumes are taken from a series of different counts and
projected to a common year (2014). The volumes are prepared for the sole purpose of
assessing the interchange and intersection performance only. The notes further identify that
no growth has been applied for the Holts Road Industrial Estate which is the industrial estate
accessed from Taylor Court.

Table 5.1 shows these 2014 projected traffic volumes for both the ‘do nothing’ and
‘interchange’ upgrade options and compares them to 2015 DTMR traffic census data where
traffic volumes are available.

Table 5.1: Projected 2014 and Surveyed 2015 Daily Traffic Volumes

                                            2014 – Do       2014 – Upgrade
 Road                                                                        2015 Census Data
                                          Nothing Option        Option
 Bruce Highway adjacent to Holts Road         22,024                22,024        21,968
 Bruce Highway north of Holts Road            16,618                18,050        15,835
 Myall Street at Ferrells Road                10,290                7,627         8,468
 Northbound On Ramp                           1,349                  855            -
 Northbound Off Ramp                          3,765                 2,675           -
 Myall Street at Holts Road (Northbound
                                              5,114                 3,530           -
 On and Off Ramp Combined)



Table 5.1 shows that the estimations used by DTMR to determine traffic volumes on the Bruce
Highway adjacent to Holts Road are comparable to the recorded 2015 census data. There is a
discrepancy with the estimated traffic volumes on the Bruce Highway north of Holts Road and
the census data. This may be due to construction activity disrupting traffic and promoting
drivers to route around the vehicle counter. Census data identifies that traffic volumes on
Myall Street in the vicinity of Ferrells Road is between the two 2014 traffic estimations. This
could be due to:

         traffic volumes on this road section being disrupted by construction activities;
         some projected movements at the Cooroy Connection Road (Elm Street) interchange
          not being available, or
         the level of traffic drawn from Myall Street (to access the Bruce Highway via Cooroy
          Connection Road) is not as high as predicted.

5.3.           Heavy Vehicle Percentage
The surveyed and estimated traffic movements are provided in Figure 5.1. TTM estimate that
heavy vehicle (HV) percentages through the Myall Street intersection would be in the order of
10%, which is generally consistent with the 2015 HV percentage on Myall Street in the vicinity
of Ferrells Road (8.49%).



Site: Lot 3 Taylor Court, Cooroy                                                            13
Reference: 16BRT0201