Traffic Response · MCU15/0122

Table 1: Summary of Sidra Outputs – Hilton Terrace/Ernest Street Intersection
 Case                          Degree of       Delay (sec)              Highest     95th Percentile Critical Queue (m)
                               Saturation                               Level of
                                               Average       Highest*   Service*    South     East        North   West

 2016 AM Current Case          39.6%           3.8           42.5       E          16.9      0        -           17.9
 2018 AM Base Case             40.4%           3.8           44.7       E          17.5      0        -           18.5
 2018 AM Project Case          41.3%           3.9           42.7       E          18.2      0        -           19.6
 2028 AM Base Case             54.7%           4.2           60.2       F          20.8      0        -           51.9
 2028 AM Project Case          55.0%           4.3           57.5       F          21.6      0        -           51.7
 2016 PM Current Case          61.0%           4.8           50.6       F          33.1      0        -           17.1
 2018 PM Base Case             62.7%           5.0           53.5       F          34.7      0        -           17.7
 2018 PM Project Case          66.7%           5.3           55.5       F          39.5      0        -           18.4
 2028 PM Base Case             74.7%           6.1           73.4       F          49.3      0        -           36.6
 2028 PM Project Case          79.8%           6.8           77.3       F          59.7      0        -           36.6
* Right turn from Ernest Street in all cases

Table 1 shows that this intersection is not expected to exceed capacity in any scenario tested. The right turns from the
minor road (Ernest Street), however, are expected to have high delays and a resultant poor level of service (F). Practically,
if drivers believe the delays are too high, they will perform a left turn from Ernest Street to turn around in Tewantin or
re-route otherwise. This analysis shows that the addition of 2-3 additional vehicle undertaking this turn in a peak hour
will have a negligible impact on the operation of this intersection.

As drivers have several options available and there are low numbers of vehicles performing this manoeuvre, the right
turn from Ernest Street is not considered critical to the operation of the road network. As such, the right turns from
Ernest Street can be banned, however this should not be the responsibility of the applicant as this is an existing problem.

It is also noted that Sidra identifies that queuing from the right turn entering Ernest Street would extend beyond the
current right turn lane in the 2028 Base Cases. This results in vehicles (turning right from Hilton Terrace) blocking through
traffic on the western approach or queuing into the painted chevron. As this will be an issue in the 2028 base case and is
not significantly exacerbated by the addition of development traffic (less than 1 car length additional to the maximum
queue), the applicant should not be responsible for any works to extend the existing turn facility. Practically if queuing
extends beyond the designated right turn lane, rather than stand in the through lane to turn, drivers will stand over the
line marking separating through movements on the approach.

Any operation issues which either are existing, or will exist at this intersection, are not anticipated to be significantly
impacted by the development proposed and as such the applicant should not be responsible for any improvements at
this intersection.

4.7      Operation of Goodchap Street/Val Crescent/Noosa Private Hospital Access Intersection
This intersection was assessed in the Road Pro report and was expected to operate suitably in the 2027 peak hours. As
the predicted development traffic generation has reduced, TTM expect the intersection will operate as well as, or better,
than this previous assessment indicates. As such, no further assessment of this intersection is required.