From:
s 9(2)(a)
To:
Rachel Herron
Subject:
Fw: NC corridor travel time
Date:
Wednesday, 5 November 2025 2:35:12 pm
Attachments:
Outlook-nd3wawif.png
Outlook-COMMUTE_01
Outlook-EngNZ_Memb
s 9(2)(a)
BE (Hons) CPEng CMEngNZ IntPE
ACT 1982
Associate
Commute Transportation
M s 9(2)(a)
W www.commute.kiwi
A 4 Leek Street, Newmarket 1023, Auckland
P PO Box 128259, Remuera 1541, Auckland
INFORMATION
COMMUTE_01b
From: Flynn Roser <[email address]>
Sent: Tuesday, October 28, 2025 9:22 AM
To: s 9(2)(a)
@commute.kiwi>; s 9(2)(a)
@aurecongroup.com>
Subject: FW: NC corridor travel time
RELEASED UNDER THE OFFICIAL
From: s 9(2)(a)
@wsp.com>
Sent: Wednesday, 21 May 2025 8:14 am
To: s 9(2)(a)
@commute.kiwi>
Cc: Flynn Roser <[email address]>; s 9(2)(a)
@wsp.com>
Subject: NC corridor travel time
Hi s 9(2)
(a)
s
is still running the travel time assessment with the full corridor model, which I expect to be done
this week. This will give us year 2054 travel times for a typical weekday. I expect the results to be
9(2)
somewhere between the results reported in the table below because the model doesn't capture high
(a)
peak periods but equally should have additional delay compared to existing.
While waiting for the full corridor results, s 9(2) has assessed the potential travel time differences
1982
between the do min and our full corridor based on existing 2024 travel times and the results are
(a)
presented in the table below. We will compare these results against the full corridor model 2024 results
to check where in the scale of congestion the model sits. We can then adjust economics accordingly to
ACT
account for holiday periods etc.
The interim results show that the weekday corridor travel time varies from 52min to 82min (i.e. high
variation). During more congested times, general traffic could be saving close to 40min along the full
corridor (based on existing volumes) but it could be as little as 8min during uncongested times. This is
because the corridor has large variations in travel time (especially in Section 3 which gets very congested
but also 2A through Kaiwaka, and 2B (stuck behind slow trucks)) Section 2C is the only section that
doesn't have high variability in travel time.
Typical Weekday Travel
INFORMATION
Time Difference (min)
Lower bound Upper bound
General traffic
Section 2A
2.9
8.9
Section 2B
1.5
7.5
Section 2C
2.0
4.0
OFFICIAL
Section 3A
0.9
8.9
Section 3B
0.5
8.5
Full Corridor travel
THE
time benefit (excl. S1)
8min
38 min
Existing full corridor travel
time
52min
82min
UNDER
FYI - Our Section 3B model shows the corridor will be operating under very congested conditions in 2054,
so that is why we have massive benefits in the economics for section 3B (it is highly likely to have the
highest BCR of the corridor followed by Section 3A Puwera section).
Ngā mihi
s 9(2)(a)
RELEASED
Technical Director Transportation
Kaipūkaha iki iki
CPEng, BE(Civil)
s 9(2)(a)
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