Response to Information Request OPW20-0145. 19.10.2020 · OPW20/0145

11.

12.

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15.

The diameter of the central islands of the two roundabouts appears to be too small. Provide amended plans
that increase the diameter to be as large as possible while still accommodating the design vehicle.

Stockwell Response

The diameter (24m) of the northern and southern roundabout islands is consistent with the Reconfiguration of Lot
(ROL) approval and technical advice provided from Cardno (Technical Memorandum, Section 2.4.1 — dated
23.08.2019) which was submitted with the ROL application. This 24m diameter complies with Austroads Guide to
Road Design Part 4B: Roundabouts:

- Designed to accommodate 19m AV
- Nominal circulating lane width of 8m
- Nominal central island radius of 12m

Barlow Shelley have conducted swept analysis to confirm the 12m island for both the new southern and northern
roundabouts is appropriate. Please refer to Barlow Shelley Drawings 1856-T10A, T12A, T13A and T14A.

Provide amended plans that widen the central island at the eastern end of Hofmann Drive to the maximum
achievable when design vehicle paths are considered (with less chevron painted areas).

Stockwell Response

Barlow Shelley have increased the central island width at the eastern end of Hofmann Drive whilst still enabling vehicle
maneuvering clearances. This is demonstrated by swept path analysis on drawing numbers 1856-R58, R65 and T10.

Provide amended plans that indicate pedestrian facilities (pram ramps and splitter island crossings) on all
legs of both new roundabouts. The features are to be located 6m clear of the roundabout circulating
carriageway so that pedestrians can cross behind a vehicle waiting to enter the roundabout.

Stockwell Response

Barlow Shelley have amended their plans to indicate pedestrian facilities on all legs of both new roundabouts. Pram
ramps and splitter island crossings are located at least 6m clear of the roundabout circulating carriageway. Please
refer to drawing numbers 1856 R56, R65, R68 & R69.

Provide amended plans that do not indicate access driveways except for those for lots specifically
described in Conditions 8 and 19a.

Stockwell Response

Barlow Shelley have amended their plans to only include driveway crossover locations for Lots 2, 4, 8-10, 15,16
and 23. Please refer to the Access Management plan on drawing number R-34B. Access to proposed Lots 3, 5, 6,
7 and 17-22 will be constructed as part of future development of the Lots. For specific access locations, please
refer to drawings 1856 R385D-R42D.

Provide amended plans that indicate lockable gates to prevent regular use of the emergency access for Lot
23, both on the driveway and on the central median crossing, together with appropriate signage.

Stockwell Response

Barlow Shelley have amended their plans to include lockable gates to prevent regular use of the emergency access
for Lot 23. It is not proposed to include any gate in the central median island as this would add an unnecessary
degree of complexity in the event of exiting from Lot 23 in a bushfire emergency. Please refer to drawings 1856-
R40.

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