Barringo Road/Hamilton Road intersection upgrade

Submissions closing on 30 September 2021, 05:00 PM

Council is seeking community feedback about the proposed design options for the intersection upgrade at Barringo and Hamilton roads, New Gisborne.

The intersection, which is being upgraded to meet future needs, will be the key gateway to the Macedon Ranges Regional Sports Precinct — a 15-hectare regional park that will provide sport and recreation facilities for the growing Macedon Ranges community.

Traffic, road safety and design engineers have been engaged to develop potential upgrade options for the intersection. Signalised (traffic lights and pedestrian signals) and roundabout options have been recommended, which take into account the key design considerations– safety, affordability, future proofing, environmental impact, spatial impact and traffic flow. 

Both options require a realignment of the Hamilton Road western approach to align with the eastern approach.

All feedback will be presented to Council at a Scheduled Council Meeting later this year.

Details about the proposed design options are outlined in the sections below.

The current offset intersection is subject to medium pedestrian and vehicle traffic volumes, mainly during school drop off and pick up times.

The Gisborne Movement Network Study (2016) projected that vehicle movement on Hamilton Road East and Hamilton Road West was likely to double by 2036.

The study also identified that the increase of vehicle movements is expected to impact the intersection of Hamilton Road and Barringo Road and recommended an upgrade to the intersection. 

Design

  • The roundabout design has a slightly larger footprint than the signalised design.
  • Similar to the signalised option, the roundabout design requires a realignment of the Hamilton Road western approach to align with the eastern approach.
  • Several existing services will need to be relocated, including the treatment of a high voltage power pole.

Click image to view proposed design.

Safety

  • Roundabouts provide for improved safety performance, and reduce vehicle accidents by about a third compared to traffic lights. The incidents involving pedestrians and cyclists accidents are significantly more with a roundabout (compared to traffic lights). These accidents usually result in more traumatic injuries as there is no car safety system around pedestrians and cyclists.

Traffic flow

  • Roundabouts will inherently result in reduced delays on average, – i.e. no drivers are stopped at red lights. They are however less effective where traffic volumes on one approach are significantly higher or more dominant as they favour the direction with the highest traffic flow.

Environmental impact

  • The impact to native vegetation at the intersections north-east corner is limited and has been classified as low significance. Any vegetation that is to be removed will be off-set by replanting across the sports precinct site.
  • The roundabout design will include lighting, as will the sports precinct, and the existing netball courts have lighting, so light impacts are existing and unavoidable.
  • The sports precinct site is not considered significant habitat for native wildlife. There is poor connectivity habitat in the general area, so this is likely to be on the periphery of foraging native mammals and birds.

Affordability

  • Calculations identify that the roundabout design is slightly more expensive than the signalised design. Additional capital expenditure would be required to upgrade a roundabout to a signalised intersection if required in future.

Design

  • Similar to the roundabout option, the signalised design requires a realignment of the Hamilton Road western approach to align with the eastern approach.
  • Several existing services will need to be relocated, including the relocation of a high voltage power pole.

Click image to view proposed design.

Safety

  • The signalised option offers a safe solution in an area with a design to complement high pedestrian and shared cyclist use. Signals also provide optimal accessibility for cyclists and pedestrians with special needs such as disability and vision impairment.
  • Traffic and Road Safety Engineering Consultants advise that a signalised crossing option provides less confusion to primary school-aged children.

Traffic flow

  • The signalised intersection allows for right-turn lanes on all sides of the intersection, allowing for increased traffic flow and reducing congestion.
  • Smart technology also allows for better traffic movement at peak times, as lights can be programmed during peak/off peak times.

Environmental impact

  • The impact to native vegetation at the intersection’s north-east corner is limited and has been classified as low significance. Any vegetation that is to be removed will be off-set by replanting across the sports precinct site.
  • The signalised design will include lighting, as will the sports precinct, and the existing netball courts have lighting, so light impacts are existing and unavoidable.
  • The sports precinct site is not considered significant for habitat for native wildlife. There is poor connectivity habitat in the general area, so this is likely to be on the periphery of foraging native mammals and birds.

Future-proofing

  • The signalised solution is a long term solution that will not require substantial upgrading.

Affordability

  • Calculations identify that there is a cost saving with the signalised design.    

There a number of ways to have your say: