Att 2 - Traffic Plan

34 Elm St, Cooroy


Table 2 – Summary of sight distance requirements

                                                                 Required Sight Distance
                                     Design
                                                                    (Minimum) (m)             Sight Distance
                                     Speed
                                                  Estimate                                     as measured
                                                                 Austroads       AS2890.1
       Approach Direction          (Frontage    Longitudinal                                      on site
                                  Road Speed)    Grade (%)
                                                               MGSD     SISD     (Min SSD)
                                                                                                    (m)
                                     km/h
                                                               (m)       (m)

      Two-way Access - East            60
                                                     -2         83       125         65           180m
                                      (50)

     Two-way Access - West             25
                                                     -2         35       42          35            53m
                                      (60)

      Exit Only Access - East          60
                                                     -2         83       125         65           199m
                                      (50)

   Exit Only Access – West (veh
                                       25
    travelling south on Elm St
                                                     -2         35       42          35            32m
    and turning left onto Opal        (60)
                St)

   Exit Only Access – West (veh
                                       20
    travelling north on Elm St
                                                     -2         28       32          35            69m
   and turning right onto Opal        (60)
                St)




As demonstrated in Table 2, the sight distances from the two-way access and the sight distance
from the “exit only” access to the east, and from the “exit only” access to the west (veh travelling
north on Elm St and turning right onto Opal St) comply with Austroad’s Guide to Road Design, SISD
and MGSD and with AS2890.1 minimum SSD requirements.

The sight distance for the “exit only” access to the west (veh travelling south on Elm St and turning
left onto Opal St) does not comply with Austroad’s Guide to Road Design, SISD and MGSD
requirements or AS2890.1 minimum SSD requirements.

The current sight distance from the exit only access to the vehicles travelling south on Elm St is
restricted by the low vegetation associated with the existing street tree. The available sight
distance can be increased if this lower vegetation were pruned.

Furthermore, Section 3.4 - Sight Distances at Property Entrances from Part 4A of Austroad’s Guide
to Road Design states that the Extended Design Domain (EDD) criteria can be used for SISD for



360 Civil Consulting - Traffic Assessment                                                   Page 8 of 22