Attachment 9 - Traffic Engineering Report

3            Site Access Arrangements
3.1 Myall Street Access
The development scheme proposes an 11m wide crossover to Myall Street, which will facilitate access to
both the relocatable dwellings and the golf club clubhouse. The proposed access driveway requirements for
the Myall Street crossover are specified in Table 3.1.

Table 3.1: Driveway Requirements for Myall Street Access
 Design Aspect                         Council Requirement      Proposed Provision   Compliance
 Distance from a minor intersection    10m (min)                180m                 Council Compliant
 Distance from a major intersection    20m (min)                250m                 Council Compliant
 Distance from another driveway        3m (min)                 230m                 Council Compliant
 Sight Distance- 60kph                 Ideally 83m, or 65m as   East bound – 186m    Council Compliant
                                       an absolute minimum      West bound – 150m
 Design Type                           Commercial (2 way)       Commercial (2 way)   Council Compliant
 Width/ Entry and Exit Widths          7m (2-way; HRV + car)    11m                  Council Compliant
 Minimum Queuing Provisions            3 cars                   3 cars               Council Compliant


A turn lane warrant analysis has been undertaken in accordance with DTMR’s Supplement to Austroads
Guide to Road Design Part 4A: Unsignalised and Signalised Intersection (Aug 2014) to determine if turn
treatment upgrades are required as a result of the proposed development. The assessment indicates that in
the 10-year design horizon (2034) scenario, the proposed development requires a channelised right turn
lane treatment (CHR(s)) and a channelised or auxiliary left turn lane treatment (AUL / CHL). Further details
regarding the proposed turn treatments is included in Section 5.

Overall, the proposed access driveway complies with Council requirements.

3.2 Emergency Vehicle Access
The development proposes the construction of an emergency vehicle access crossover, which will form a
fourth leg to the Myall Street, State Route 6 and Nandroya Road roundabout. Whilst emergency service
vehicles are able to utilise the main access crossover to Myall Street, the proposed access will provide an
alternate access to the southern portion of the development. Use of this access will be strictly reserved for
use by emergency and service vehicles (up to the size of a small rigid) with access restricted by a security
gate or bollard at all other times. It is understood that the on-site manager will be responsible for ‘unlocking’
the access during an emergency. The design of this access will be refined through the detailed design phase
in accordance with NSC design requirements.

Whilst the proposed driveway width of 4.5m does not strictly satisfy the AS2890.2 requirements for a two-
way circulation aisle, the driveway will only be utilised in emergencies, with all emergency vehicle
movements expected to operate in a tidal fashion; inbound in response to the emergency, outbound
following resolution of the emergency. Based on the fact that the driveway will be only occasionally used by


Site: Lot 2 & 3 Myall Street, Cooroy                                                                         11
Reference: 19BRT0357