Attachment 2 - Holland Traffic Consulting · MCU13/0251

at Figure 1.

Comparison of peak hour David Low Way traffic flows from the recent Heron St roundabout count, with
peak period traffic flows in David Low Way on the southern leg of the Heron St roundabout from 2007 and
on several days in 2009, as documented in Appendix B of our 13 December 2013 report, indicates
negligible change in traffic flows over that 5-7 year period.

In addition, it is noted that we understand the economic assessment of the development predicted
catchment growth of about 1%pa over the next 10 year period. This contrasts with the 3%pa growth rate
in traffic flows that was assumed in our 13 December 2013 report. For the purposes of this assessment
we have conservatively used that same 3%pa growth rate in traffic flows (even though the historical
growth rate and the rate used in the economic report are much lower).

On the above basis, predicted 2024 peak hour traffic flows at the Heron St roundabout, without the
development are as follows:

2024 AM background peak (high growth):
                                           David Low Way
                                          16   0 805 63




                              0                                       51
               Hotel access   0                                       3       Heron St
                              0                                       90




                                          3     602 92    34
                                              David Low Way


2024 PM background peak (high growth):
                                           David Low Way
                                          12   5 551 66




                              1                                       67
               Hotel access   1                                       4       Heron St
                              3                                       137




                                         13     581 105     29
                                              David Low Way


Capacity analysis of the existing roundabout has been undertaken using the Sidra package, with default


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