sydney-city-centre-review-of-environmental-factors

The results also indicate that five intersections have LoS of D or E, with LoS of D
considered unacceptable. LoS results are discussed further in Table 6-4 below.
It is also important to note that the intersection modelling assessed each intersection
in isolation. It did not therefore account for the queueing effects due to the proximity
of adjacent intersections. As demonstrated in the Roads and Maritime network
modelling (refer to the previous section sub-heading) this effect dramatically reduces
the overall capacity of the whole network, which can lead to what is commonly
referred to as ‘grid lock’.
Table 6-4 summarises the existing performance issues for each precinct, with further
details provided in Appendix C. The table highlights key road network deficiencies
identified by the intersection traffic modelling and does not include locations where
existing LoS is acceptable and modelled queue lengths do not create operational
issues. The table also provides an overview of the whole precinct, rather than the
specific intersections that would be improved under the proposal.
Table 6-4 Precinct road network performance issues (existing conditions, 2014
peak periods)
Work site
location
Precinct 1: north west
Capacity/LoS
Queue length
Precinct 2: retail
Capacity/LoS
Queue length
Precinct 3: southern
Capacity/LoS
Queue length
Network performance issue
All intersections are estimated to operate at LoS C or better during
peak periods when considered in isolation.
Traffic queues originating on the eastbound approach of the York
Street/George Street intersection, and propagating along the York
Street corridor currently reduce the performance of upstream
intersections.
All intersections are estimated to operate at LoS C or better during
peak periods when considered in isolation.
Traffic queues originating at the following intersection approaches
propagate to upstream intersections, reducing intersection,
corridor, and network performance:
- Traffic approaching the George Street/York Street intersection
on York Street eastbound
- Traffic approaching the Market Street/Clarence Street
intersection on Market Street westbound
- Traffic approaching the Park Street/Pitt Street intersection on
Park Street westbound.
Demand exceeds capacity at work site S3: Pitt Street (C: Goulburn
Street intersection) (LoS E) and is close to capacity at the work site
S5: Broadway (D: Abercrombie Street intersection) and work site
S6: Pitt Street (LoS D).
Traffic queues originating at the following intersection approaches
propagate to upstream intersections, reducing intersection,
corridor, and network performance:
- Traffic approaching the George Street/Goulburn Street
Sydney City Centre Capacity Improvement 175
Review of Environmental Factors