Referenced Document - MCU12/0216

Quarry Rehabilitation
Lake Macdonald Drive, Lake Macdonald

© 2012 - TTM Consulting (SC) Pty Ltd                                                               Reference No: 12SCT0037


Table 6.2 shows the values for various Levels of Service for a rural road in rolling terrain with
varying ratios of design hour volume to AADT.

Table 6.2: Maximum AADT’s for Various LOS on Two-Lane Two-Way Rural Roads

                                                                         Level of Service

Design Hour Volume to AADT                        A                B                C             D           E
           Ratio

                 0.10                          1,100             2,800           5,200           8,000     14,800
                 0.11                          1,000             2,500           4,700           7,200     13,500
                 0.12                            900             2,300           4,400           6,600     12,300
                 0.13                            900             2,100           4,000           6,100     11,400
                 0.14                            800             1,480           3,700           5,700     10,600
                 0.15                            700             1,800           3,500           5,300      9,900
(Source: AUSTROADS Guide to Traffic Engineering Practice, Part 2: Roadway Capacity, Table 3.9)



6.3         Operational Performance
For a Level of Service B, the maximum AADT values range from 1,800 to 2,800 depending on the
design hour volume to AADT ratio. The peak hour volumes along Lake MacDonald Drive are
anticipated to be approximately 13% (0.13) of the average daily traffic on a weekday. From Table
6.2 above, a maximum AADT of 2,100 is assumed for a LOS B.
Comparing these values with the average AADT levels along Lake MacDonald Drive from Table 4.1
being approximately 2,100vpd, indicates that the existing road corridor operates at LOS B.
Based on the above LOS criteria, TTM considers that the Lake MacDonald Drive corridor will
operate at a Level of Service B for the duration of the works.
TTM note that the road operating at a LOS B should have no significant road capacity issues, with
the predicted level of development truck traffic having a negligible impact on overall road corridor
performance.


6.4         Lake McDonald Drive Intersection Operational Criteria
In reviewing the intersection traffic operational requirements, TTM has made reference to RPDM
Chapter 13: Intersections at Grade: 13.5.4 Un-signalised Minor Road Intersections.
Table 13.4 indicates the maximum traffic volume combinations for uninterrupted flow conditions.
It is unnecessary to flare intersection approaches or carry out an intersection analysis when the
combinations of major road and minor road volumes are less than those in the table.
The proposed haulage activity will impact on the road network between the sending and receiving
quarry access locations.
The haulage activity will increase the estimated two way traffic on the impacted section of Lake
Macdonald Drive, however, the total volumes (including truck activity) on Lake Macdonald Drive
will be less than 3,000vpd and as such the haulage activity does not require a higher order road
than is currently provided.


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