RFI DTMR memorandom response

30f3

There are various kinks in lanes and narrowing of the lane width. These errors in geometry and
cross section need to be resolved.

Geometry has been corrected

There is currently a high-entry angle for left turner from Lamonts Road. As per Austroads Part 41,
Clause 6.2.3 change the alignment of Lamonts Road as it approaches Cooroy Connection Road to
ensure the observation angle is between 700 - 900.

The centreline of Lamonts road has been shifted north to bring the curve further back from Elm street.
This gives extra length for the design vehicle to turn perpendicular with Elm street at the stop line.

Why is there a reduction in shoulder width as a vehicle turns left from Lamonts Road? Maintain
shoulder width through the intersection.

Shoulder width has been maintained for the entire length.

Provide more detail for the power pole behind guardrail. Is there adequate room behind guardrail
to allow for the deflection of guardrail in the event of an accident? It is likely to be more cost
effective to remove the gap between the two sections of guardrail (compared to providing two
additional end treatments).

The geometry of the CHR turn in to Lamonts road has been modified such that the northbound lane is now
a straight through and the lateral movement has been shifted to the turn and southbound lanes. Should
this be found to be acceptable it will remove any conflicts with the existing power poles on the western
side of Elm Street. Refer drawing RF01.

Line marking is incorrect across Lamonts Road.
Refer drawing RFO1 for amended linemarking.
How has storage length been determined for right turn into Lamonts Road?

Storage length for CHR into Lamonts road has been designed as 15m which allows for one 12.5m MRV
design vehicle.

Should you require any further information please do not hesitate to contact the undersigned.

Yours sincerely
Calibre Consulting

Rob Blake
Manager - Urban Development

ATTACHMENTS
4. Revised Drawings as per Document Transmittal

COPIES

4, Palm Lake Works Pty Ltd