Traffic Engineering Letter · MCU24/0120

As such, the SSD has been assessed from the Avocet Parade northern approach for a throughbound
vehicle to appropriately react and break upon observing a vehicle exiting from the vehicle access for
the southern unit. For this assessment, the following parameters have been adopted:

N    Design Speed (V): 30 km/hr

N    Reaction Time (RT) 2 seconds,

N    Coefficient of Deceleration (d): 0.46,

N    Longitudinal Grade (a): 0%

Therefore, the minimum SSD required for a vehicle approaching from the northern along Avocet
Parade is 25.0m

The minimum SSD required for southern unit driveway is provided at Appendix C, and is illustrated
below on Figure 1.

Figure 1   Minimum SSD Requirement




Therefore, the minimum SSD of 25.0m is able to be accommodated along Avocet Parade, such that an
unimpeded driver line of sight is provided for a southbound vehicle along Avocet Parade to react and
brake for a vehicle exiting the southern unit driveway.
Furthermore, it is reasoned that the southern unit driveway will have an incredibly low traffic
generation (to the degree of one vehicle in the peak hour period), and hence the likelihood of an
outbound vehicle exiting the driveway while a southbound vehicle approaches from the north will be
incredibly low.

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