Recommendations - City of West Torrens - SA.Gov.au

12.0
Local Road Network
The data also forms the basis of “before” and “after” comparisons of traffic schemes and major road projects such as the
Bakewell Bridge Underpass and South Road Underpass. The responsibility for traffic data collection is summarised below.
Data Responsible What the data is used for
Traffic volumes -
non arterial roads
Council Collected as part of count programme. Provide information on daily and peak hour
traffic flows and used for traffic assessment of problems requested by the public.
Also enables Council to assess traffic growth in Council roads.
Traffic volumes -
arterial roads
Commercial vehicles
- non arterial roads
Commercial vehicles
- arterial roads
DTEI
Council
DTEI
Collected from 11-hour manual counts by DTEI staff. These counts are then factored
up to provide the Annual Average Daily Traffic (AADT) from which analysis of traffic
growths are undertaken for the metropolitan area. Peak hour flows counted also
form the basis for intersection improvements, capacity analysis, performance of
intersections, signal phasing assessment and projections for future growth.
Collected as part of count programme. These counts are used to quantify
commercial vehicles in Council roads so that amelioration measures could be
implemented to minimise these problems.
From 11-hour manual counts. A summary of commercial vehicle volumes is provided
which could then be used to assess future growths.
Traffic speeds Council Collected as part of count programme. Speeding is one of the most commonly cited problems
by the community. Use of the 85th percentile speed forms the basis of quantification of the
speeding problem.
“ Collection of traffic data
allows traffic conditions
to be identified and, where
previous data is available,
it allows comparisons
to be made. This gives
Council an assessment
of ‘traffic growth’.”
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Part 1 - Overview | Local Road Network
There is an extensive database of
traffic information collected over
many years. Currently this data is
being incorporated into the Asset
Management database and is available
to view via the GIS plan.
A regular program of traffic
counting has been undertaken within
the City for many years. Despite this
extensive program, there are many
streets in the City where traffic data is
not available, due primarily to the large
number of streets which the City is
responsible for.
As traffic counts are not normally
undertaken during school holiday
and Christmas/New Year holiday
periods, there is generally a window
of approximately 40 weeks available
for traffic counting. Traffic counts are
usually undertaken over a full
week period.
Given that there are approximately 10
traffic counters available, allowing for
time to program, set-up, download
and assess each of the count data,
realistically a program of 200 to 300
sites per annum could be achieved
using current resources.
Recommendation
• Maintain the current traffic count
program in the City.
• Seek regular DTEI updates on new
count information for the main road
network.
• Complete the input the traffic
count information into the Asset
Management database and GIS plan.