Traffic Engineering Report

Table 7.2: Summary of Sidra Outputs (Holts Road/Taylor Court Intersection)

 Case                              Degree of    Highest/   Highest    95th Percentile Critical Queue (m)
                                   Saturation   Average    Level of
                                                                      South          East   North   West
                                                Delay      Service
 2029 AM Base Case                 7.5%         6.3/4.9    A          0.0        -          2.9     0.6
 2029 AM Project Case              16.1%        7.2/5.4    A          0.0        -          6.6     4.0
 2029 PM Base Case                 7.5%         6.0/4.8    A          0.0        -          0.9     2.6
 2029 PM Project Case              17.1%        6.8/5.4    A          0.0        -          4.4     6.2



Table 7.2 shows the existing intersection layout will suitably cater for projected traffic
volumes, with ample spare capacity. No further analysis or intersection upgrade is required
from a capacity perspective.

7.2.1.         Turn Treatments
Austroads Guide to Road Design (Part 4A), has been utilised to address the warrants for turn
treatments. The assessment has been undertaken for the 2029 design year, based on the
development case volumes shown in Appendix D. These volumes are plotted in Figure 7.5,
which is a reproduction of Figure 4.9(a) of the Austroads Guidelines. This figure is used for
determining the warrants of turn treatments for roads less than 100km/h design speed.



                                                                            Left Turn

                                                                            Right Turn




Figure 7.5: Holts Road/Taylor Court Turn Warrant Analysis



Figure 7.5 shows that this intersection would require a basic left (BAL) turn treatment and a
BAR treatment. The BAL treatment is provided through the 2.0m wide shoulder on Holts Road.


Site: Lot 3 Taylor Court, Cooroy                                                                     23
Reference: 16BRT0201