Parking & Traffic Statement Northrop Consulting Engineers Blocks 1-6 Section 8 Dickson December 2018 CR171532_EC01 Page 1 CR171532_EC01 04 December 2018 Version 2 Andrew Collins Collins Caddaye Architects 37 Canberra Avenue Forrest ACT 2603 Email: [email protected]Dear Andrew, Project: 21 Apartments - Moncrieff Street - Dickson Re: Statement on Parking & Traffic Blocks 1–6 Section 8 Dickson This report is prepared for the ACT Government on behalf of Collins Caddaye Architects to investigate the traffic & parking requirements for the proposed development noted above. This report is based on the preliminary plans provided by Collins Caddaye Architects on 03/12/2018. The scope of this project was recently increased from the original proposal of 10 apartments over 3 blocks to the current proposal of 21 apartments over 6 blocks. This Parking & Traffic Assessment is for the proposed Re-Development of 6 blocks located on Blocks 1–6 Section 8 Dickson. This includes the demolition of the existing 6 single dwellings, construction of a townhouse style complex consisting of 15 x 2-bedroom, 4 x 3-bedroom and 2 x 4-bedroom dwellings within 2-3-story high building (ground and 1-2 floors above), 2 concrete driveways, pathways and basement parking. The new development will increase the amount of traffic generated when compared to the original 6 single dwellings; as such this report has been updated to note the parking required for the proposed development and assess that the existing road network has the capacity to absorb the additional traffic generated by the proposed 21 apartments. Blocks 1-6 Section 8, (combined area 3,577m²) are located on 26-36 Morphett Street in Dickson. In accordance with the Territory Plan, these Blocks are designated as RZ3: URBAN RESIDENTIAL. The existing site and surrounding roads of interest are highlighted on Figure 1. This report updates the previous assessment undertaken in July 2017 to provide a current assessment of the existing and future parking & traffic requirements, for the site based on the current development proposal.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Updated Accident data was obtained by Roads ACT on the roads adjacent to the site. A summary of the data obtain is shown with in the Table 1. The full data as provided by TCCS can be observed in Appendix A.
In Summary:
The obtained data spans from 2013-2017;
Accident data was obtained at the intersections and mid-block (between intersections) locations as shown on Figure 2;
only 3 accidents involving an injury were observed with all being at different locations, in different years and all involved different vehicle movements suggests that they are not at all related to each other; and
The largest number of accidents occurred at the Intersection of Challis St and Morphett Street with 15 accidents observed over the 5 year period all of which were noted as property damage only.
Figure 2 Approximate locations on nearby streets where accident data has been obtained
Under the Federal Government Black Spot program, for an area to be defined as a Black spot road (midblock or intersection) requiring modification, the road in question is required to meet the following condition.
“For individual sites such as intersections, mid-block or short road sections, there should be a history of at least three casualty crashes over a five-year period. For lengths of road, there should be an average of 0.2 casualty crashes per kilometre per annum over the length in question over five years.”
Table 1 shows a summary of the accident data obtained and from the above definition, none of the locations mentioned in the accident data provided meet this requirement.
Table 1 – Summary of Accident data on the nearby roadways to the proposed development
Previous Traffic count data was obtained from “Matrix traffic & Transport Data” which contained a full week’s worth of traffic volume data from July 27th 2017 to 2nd August 2017. The 3 locations this data was obtained from are as follows:
(Site 1) Midblock Morphett Street – Just West of Moncrieff Street before Challis St;
(Site 2) Midblock Morphett Street - Just East of Moncrieff Street at the start of the 40km/h school zone; and
(Site 3) Midblock - Moncrieff Street just south of Morphett Street;
The full traffic volume data obtained is attached in Appendix B.
Figure 3 shows the locations where these traffic volume counts were undertaken.
Figure 3- Locations where traffic counts were undertaken in July 2017
For the updated traffic assessment currently being undertaken; a traffic growth factor of 2% has been utilised and added to the previously undertaken traffic counts. This growth factor is the same growth factor as outlined within the ACT “Guidelines for Sidra Analysis” document.
From the Previously undertaken traffic counts by “Matrix traffic & Transport Data”, the 2% growth factor was applied and the traffic volumes in Table 2 were observed:
Table 2 – Estimate traffic growth where 2% growth factor is applied to observed traffic data
Location Estimated Capacity (VPD)
Weekday Average (VPD)
7 Day Average (VPD)
Max AM Peak (VPH)
Max PM Peak (VPH)
Site 1
(Eastbound)
0 – 3,000
2058 1805 420 195
Site 1
(Westbound)
0 – 3,000
2417 2112 278 284
Site 1
(Combined)
3,001 – 6,000 4474 3916 697 462
Site 2
(Eastbound)
0 – 3,000
1464 1262 308 142
Site 2
(Westbound)
0 – 3,000
1607 1377 213 216
Site 2
(Combined)
3,001 – 6,000 3071 2639 520 357
Site 3 (Southbound)
0 – 1,000
801 725 149 75
Site 3 (Northbound)
0 – 1,000
1041 939 133 114
Site 3
(Combined)
1,001 – 2,000
1842 1663 269 187
From the traffic data provided, it can be observed that:
Moncrieff Street is operating at around 92% of its total nominal capacity on a weekday average;
Morphett Street is operating at around 75% of its nominal capacity between Moncrieff St & Challis St on a weekday average;
Morphett Street is operating at around 51% of its nominal capacity east of Moncrieff St.
Approximately 46-48% of the vehicles on Morphett st were observed to be traveling East (away from Northbourne Ave) with a peak of 420vph being observed during the morning peak.
With a maximum of more than 690 vph being observed during the morning peak on Morphett Street it may be beneficial from a safety and a resident usability point of view, to only provide vehicle access points onto Moncrieff Street and Guthrie Street (as currently noted on the provided architectural plans) with Moncrieff St observed at having less than half this amount of peak hour vehicle movements.
It has been estimated that given the location of Guthrie Street it is likely to have similar if not slightly less traffic volumes than Moncrieff street as it is a short side street that does not provide direct access to any other major collector roads which Moncrieff Street does not already provide access too.
The current proposal for the site will have the traffic generation rates as noted in the below tables. The traffic generated for the 6 existing single dwellings has also been noted below to allow a comparison between preconstruction to post construction traffic generation to be made. The traffic rates noted were obtained from the RTA “Guide to Traffic Generating Developments” (October 2002), RMS “TDT 2013/ 04a Updated traffic surveys” (August 2013) as well as the ACT Government Estate Development Plan (May 2018). Where rates exist for a dwelling type in multiple documents the higher value has been used in order to produce a more conservative estimate.
These traffic generation rates and the estimated total traffic generated by the proposed development can be observed in Table 3 and Table 4.
Table 3 – Estimated daily traffic generation post development
Development Option Traffic Generation rate (vpd) Daily Traffic generated (vpd)
Existing Single dwellings x6
9 vpd/ Dwelling
-54 vpd total
Proposed 15 x 2-bedroom unit (medium density housing) 6 vpd/ Dwelling 90 vpd total
Proposed 4 x 3-bedroom unit (medium density housing) 7 vpd/ Dwelling 28 vpd total
Proposed 2 x 4-bedroom unit (medium density housing) 7 vpd/ Dwelling 14 vpd total
Total additional traffic generated post development 78 vpd
Table 4 – Estimated peak Hour vehicle movements post development
Development Option Peak Traffic Generation (vph) Peak Traffic generated (vph)
Existing Single dwellings x6
0.85 vph/ Dwelling
-5.1 vph total
Proposed 15 x 2-bedroom unit (medium density housing) 0.5 vph/ Dwelling 7.5 vph total
Proposed 4 x 3-bedroom unit (medium density housing) 0.65 vph/ Dwelling 2.6 vph total
Proposed 2 x 4-bedroom unit (medium density housing) 0.65 vph/ Dwelling 1.3 vph total
Total additional peak traffic generated post development 6.3 vph total
When the traffic rates in the above tables are added to the new traffic volumes obtained it is observed that:
Moncrieff Street has the capacity to absorb the additional traffic volume (totalling 78vpd); post development with the road still being below its estimated nominal capacity.
It should is noted that the traffic produced is likely to be a split exiting onto Moncrieff and Guthrie Street; therefore the post development traffic on these roads will likely be smaller than the total value noted above.
Morphett Street has ample capacity to absorb the additional traffic granted with the road being at less than 80% of its estimated nominal capacity post development.
Parking & Traffic Provision Conclusions It was concluded that:
Based on the current Parking and Vehicular Access Code, the proposed development on Blocks 1-6 Section 8 requires 35 parking spaces for residents & 5 parking spaces for visitors (40 spaces in total). Given the location of the proposed development these spaces will need to be provided onsite
At least 2 of the onsite parking spaces should be designated as disabled accessible including the associated shared zone.
The current proposal shows 43 parking spaces onsite with 2 marked as disabled accessible including the associated shared space between them.
2 additional motorcycle spaces are shown on the ground floor being the basement ramp and the proposed waste enclosure.
21 class 1 or 2 bicycle parking spaces are to be provided for residents. The current proposal shows that each parking space in the basement has a storage unit which provides a fully enclosed individual locker (Class 1 bicycle storage) for each dwelling.
Class 3 bicycle parking spaces are currently shown on the ground floor near the above mentioned motorcycle parking. This is currently nominated as “visitor bicycle parking”
From the traffic data obtained from Roads ACT the nearby roads of, Moncrieff St & Morphett Street are assessed to have capacity to absorb the additional traffic generated by the proposed development.
As currently shown on the provide site plan it is beneficial from a safety as well as a resident usability point of view, to provide vehicle access points off Moncrieff Street and Guthrie Street rather than Morphett Street as these streets have been observed as having much smaller peak hour vehicle movements when compared to Morphett Street.
Based on the currently provided with all the required parking spaces being noted onsite the
current development proposal of Blocks 1-6 Section 6 Dickson appears to be feasible on
parking & traffic grounds.
Don’t hesitate to contact the undersigned if you have any questions