This is an HTML version of an attachment to the Official Information request 'Auckland Harbour Bridge active modes decision'.


Southbound 
Option
Walking & Cycling Event
SB
Cross Section - Overarch Span 
AHB Traffic Demand v. Capacity
Sunday morning - 3 traffic lanes northbound, 3 traffic lanes southbound 
In a 3 lane northbound/3 lane southbound configuration, the capacity of the Auckland Harbour 
Bridge is slightly greater than 5,000 vehicles per hour in each direction.  Based on typical Sunday 
traffic volumes, traffic demand would be greater than capacity between 11am and 2pm in the 
northbound direction, and 10am and 2pm in the southbound direction.  A strong communica-
tions strategy alerting motorists and heavy haulage to the event will assist in mitigating this by 
allowing vehicles time to plan to use alternate routes.
Key Risks & Mitigations 
Risk
Mitigation
Event patrons in close proximity to traffic
Steel barrier system between users & vehicles
Event patrons access to harbour
Fencing, Strategically stationed security personnel
Steep bridge gradient
Clear delineation of mode types, speed limit signage
Network and stakeholder impacts
Extensive communications plan and strategy
Inclement weather during event
Quick deploy plan to remove patrons from AHB
Option Specific Issues & Opportunities
- Security upgrades required (e.g. lighting) at Tennyson Street Underpass
- Ramp/scaffold construction required at north access point
- Vehicle access at Sulphur Beach Road & Sulphur Beach Road Underpass will have to be restricted
- Only 1 ramp closure required (Shelly Beach Road)
Esimated Costs
Barriers, Attenuator, Signage
 $200,000
Access
$20,000
Communications
$20,000
Mobilisation & Demobilisation
$80,000
Security & Safety Upgrades
$10,000
Design & Project Management
$40,000
Contingency
$50,000
TOTAL
$420,000
3am - 6am: Set-up
6am -11am: Shared Path Trial
11am - 2pm: Demobilisation



Southbound 
Option
Walking & Cycling Event - Access
SB
North Access - via Tennyson Street Underpass & Suphur Beach Road
South Access - via Shelly Beach Road & Westhaven Drive