Current situation
Burringbar Street, which runs
through the centre of Mullumbimby has been identified as a high pedestrian
activity zone, as such the speed limit has been reduced to 30km/h.
Consequently, Tincogan Street
has been identified by most drivers as the northern, east-west through
movement corridor around the town centre of Mullumbimby. This
redistribution of traffic was anticipated by the Shires Place and Planning
Strategy and Infrastructure Services.
The reprioritisation of the
intersections of Dalley / Tincogan Street and Stuart / Tincogan Street is
part of a larger scheme to manage the impacts from the Burringbar Street
place making treatments, while providing a safe movement corridor around the
centre of town.
Another key factor for the
reprioritisation of Tincogan Street is that Dalley Street and Stuart Street
are currently the only two intersecting streets on Tincogan Street that
maintain priority (Tincogan Street gives way).
See locality map in figure 1
below.
Figure 1: Locality Map
Purpose
The purpose of this report is to
obtain Local Traffic Committee endorsement for the proposed priority change
to the intersections of Tincogan / Dalley Street and Tincogan / Stuart
Street.
A concept for each intersection
is shown below, this concept is for visualisation purposes only and will be
designed to conform with all the relevant standards and guidelines should
endorsement be received. Further detail can be found in attachment 1
and 2 contained within this document.
Figure 2:
Concept layout Tincogan Street and Dalley Street
Figure 3:
Concept layout Tincogan St and Stuart St
Figure 4:
Current intersection layout
The intersection
reprioritisation concepts contained within attachment 1 and 2 of this report
were modelled (Sidra intersection analysis) with a 10-year design life.
Analysis has indicated that there is adequate capacity extending beyond 10
years should the change occur.
A detailed traffic study
undertaken by Stantec Consulting has also taken place which included a
microsimulation model. This modelling did not include the concept
scenarios contained within this report. The model only considered
straight reprioritisation without any additional lanes or median storage
potential for right turning drivers from the minor legs.
This microsimulation model
indicated there would be no net worsening in terms of performance following
10 years of traffic growth. This report can be found in attachment 3
(E2022/90532) of this report.
Figure 5:
Traffic survey data (intersection count) Dalley St/Tincogan St, 17 June 2021
Figure 6:
Traffic survey data (intersection count) Stuart St/Tincogan St, 17 June 2021
Safety (Current situation)
An investigation of the
available crash data has indicated that there have been no reported crashes
in the last 5-years at either of the subject intersections. However,
there are significant perception issues at both intersections. When
travelling on Tincogan Street drivers have been seen to give-way to through
traffic on Tincogan Street from Dalley Street and Stuart Street.
Anecdotally, one reason for this
is that the road functionality significantly changes on the northern side of
Tincogan, Dalley and Stuarts Streets become residential access streets rather
than minor collectors. Consequently, the intersections almost feel like
“T” intersections with Dalley and Stuart Streets forming the
minor approaches (south). This issue is also exacerbated by the fact
that on both approaches all other intersections give way to Tincogan Street.
Figure 7: Tincogan St, westbound approach to Dalley St
Associated works
There are a number of works that
will be undertaken to facilitate the reprioritisation at the intersection of
Tincogan / Dalley Street, these works will include but not be limited to:
· Removal of the existing kerb ramps north-south on the
westbound approach (Tincogan Street)
· Link new crossing points with footpath and kerb
extensions
· Provide tactile footpath/crossing treatments
· Provide advanced warning signage (Changed traffic
conditions)
· Pedestrian chanelisation (e.g., fencing, gardening,
street furniture)
Figure 7: Associated works (Tincogan St/Dalley St intersection
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