Traffic Engineering Letter · MCU24/0120

Modus Response
Modus’ response to Item 1 is outlined in the subsequent report sections.

AVOCET PARADE ROAD CONDITIONS

The proposed southern unit will achieve vehicular access onto Avocet Parade, which comprises the
following conditions:

N   Posted speed limit of 50 km/hr,

N   Carriageway width of 7.0m,

N   4.5m verge along the southern site boundary frontage.

PRACTICAL SPEED LIMIT

While it is noted that Avocet Parade comprises a posted speed limit of 50 km/hr, it is reasoned that
throughbound vehicles along Avocet Parade at the site frontage will travel at lower speeds to
manouevre through the 90-degree bend. On this basis, Modus has undertaken a B99 swept path
assessment (provided at Appendix B) which confirms the maximum speed that a throughbound
vehicle approaching from the north can practically manouevre through the 90-degree bend is 30
km/hr.

Therefore, the assessment herein has been undertaken for a frontage road speed of 30 km/hr at the
site frontage.

STOPPING SIGHT DISTANCE

In accordance with Australian Standards AS2890.1, the minimum vehicle sight distance requirement is
stipulated for a frontage road speed of 40 km/hr or greater.

Provided that no vehicle sight distance requirement is stipulated for a frontage road speed of 30 km/hr,
Modus has instead undertaken a Stopping Sight Distance (SSD) assessment in accordance with the
Austroads Guide to Road Design Part 3 guidelines, which is defined below:




Traffic Engineering Letter – IR Response
3 Avocet Parade, Peregian Beach                  -2-