Traffic Engineering Letter · MCU24/0120

Council Further Advice Item 1 – Driveway Crossover
Council Commentary
The Traffic Engineering Letter prepared by MODUS calculates the minimum required Stopping Sight
Distance (SSD) of 25.0m. Council is of the opinion that this distance is arbitrary due to:

a. the assumed designed speed of 30 km/hr – noting that no traffic count data has been provided
indicating that the 85th percentile operating speed is 30 km/hr.

b. the assumed reaction time of 2.0 seconds – noting that Austroads’ AGTRD P3 states that a reaction time
of 2.5 seconds is desirable and commonly adopted as a minimum unless otherwise justified.

c. the assumed longitudinal grade of 0% - noting that SCG Consulting’s Site Survey & Existing Services
Plan (0336-OW1.1) dated Aug 2024 denotes an approximate longitudinal grade of ~4.1% (negative)
measured 30 metres upstream from the driveway crossover.

Council does not believe the use of the ‘concealed driveway’ street sign is an appropriate measure given
the development is a full demolition and rebuild, and a more appropriate driveway location exists.

Council is not satisfied that the proposed driveway crossover complies with Performance Outcomes PO1
and PO2(a) of the Driveways and Parking Code. Inadequate detail has been provided demonstrating the
proposed driveway crossover is safe for its intended use and will not cause adverse impacts on the safety
of the road network. The location of the proposed driveway crossover does not provide adequate Sight
Distances as discussed above and in Section 3.4 of Austroads’ AGTRD Part 4A. Council’s preference
remains for the driveway to be relocated to the eastern side of the southern frontage.

Advice Required 1. Provide revised plans relocating the driveway crossover to the eastern side of the
southern frontage.

Modus Response
Modus’ response to this Further Advice Notice item is detailed in the subsequent report sections.


AUSTRALIAN STANDARDS AS2890.1 VEHICLE SIGHT DISTANCE REQUIREMENT

In accordance with Australian Standards AS2890.1, the minimum vehicle sight distance requirement is
based on the frontage road speed:




Traffic Engineering Letter – Further Advice Response
3 Avocet Parade, Peregian Beach                  -3-