ISBN: 0-478-28992-8
land transport road assets
land transport road assets
Kapiti Coast District
Wellington Region
Information as at June 2006
land transport road assets 2
ISBN: 0-478-28992-8
Purpose of this publication
Land Transport New Zealand annually publishes comparative information on the maintenance of
local authority roads. The information in this publication is based on financial assistance claimed
from Land Transport NZ in 2005/06 and on the annual achievement returns from each territorial
authority RAMM database.
This enables a comparison to be made between local authorities and their peers. It is also useful
as a benchmark for auditing and for reviewing of maintenance funding allocations.
This publication is also available on our website under Performance of Land Transport
(www.landtransport.govt.nz/information-for/local-transport-authorities.html).
Enquiries
For further information please contact Colin Tubb at Land Transport NZ’s National office in
Wellington, ph 04 916 4283 or email [email protected]
Feedback
We are keen to receive your feedback so that improvements can continue to be made. Please
contact the manager of performance information at your local Land Transport NZ office.
Northern Region
Midland Region
Central Region
Southern Region
09
07
04
03
969
958
931
964
9800
8740
8900
2866
Index
Section
Sub-section
Page
Purpose of this publication
2
Enquiries and feedback
2
Definition of terms
3
Physical road statistics
5
Road condition
Maintenance costs
Asset use
Smooth travel exposure for all sealed
roads
6
Surface condition
6
Pavement condition for all sealed roads
7
Road roughness
7
Trends in road condition and structural
maintenance spend
8
Structural maintenance costs
8
Vehicle kilometres travelled on local
roads
9
Regional vehicle kilometres travelled
9
Work completed
10
ISBN: 0-478-28992-8
land transport road assets 3
Definition of terms
Approved Organisation (AO)
Transit New Zealand, the Auckland Regional Transport Authority (ARTA), a regional council, a territorial
authority, or any other approved public organisation.
Condition Index (CI)
Condition Index is a combined index, a ‘weighted sum’, of the surface faults in sealed road surfaces. CI
combines alligator cracking, scabbing, potholes, pothole patches and flushing.
100 - CI ensures that the higher the number, the better the condition.
CI and the routine for calculating it using the RAMM software, were introduced in the 2002/03 year.
Pavement Integrity Index (PII)
Pavement Integrity Index is a combined index of the pavement faults in sealed road surfaces. It is a
‘weighted sum’ of the pavement defects divided by total lane length. PII combines surface faults (CI)
with rutting and shoving.
100 - PII ensures that the higher the number the greater the pavement integrity.
Pavement integrity index (PII) and the routine for calculating it using the RAMM software, was introduced in the 2003/04 year.
Road Roughness : >150 NAASRA counts
Road roughness is measured by a system developed by the former National Association of Australian
State Roading Authorities (NAASRA). Values are obtained by a special-purpose vehicle travelling down
both the outside lanes of length of road. The rougher the road, the higher the NAASRA counts per lane
kilometre.
Approved organisations define acceptable levels of service for roughness on their networks. The graph
provided in this document has used a threshold of 150 NAASRA. A NAASRA count of greater than 150
typically indicates a road which is becoming a concern in terms of its roughness and the number of complaints likely to be generated.
Smooth Travel Exposure (STE)
Smooth Travel Exposure measures the proportion (%) of vehicle kilometres travelled in a year (VKT)
that occurs on ‘smooth’ sealed roads and indicates the ride quality experienced by motorists.
A ‘smooth’ road is one smoother than a predetermined NAASRA roughness threshold. The thresholds
used vary with traffic density and road location. Heavily trafficked roads have a lower (smoother) threshold. High volume urban roads have lower roughness thresholds than low volume rural roads.
Structural Maintenance
Structural maintenance activity deals with the repair of the road (pavement and surface) and includes
the following work categories: pavement maintenance; area-wide pavement treatment; major drainage
control; maintenance chip seals; thin asphaltic surfacing; and seal widening.
Vehicle Kilometres Travelled (VKT)
VKT is the total annual vehicle kilometres travelled in an area. This is calculated from the number of vehicles crossing a point in both directions in a 24 hour period, times the length of the road being travelled. Individual road VKT is added to give a value for the whole road network in that area.
Work Category
Claims for funding from Land Transport New Zealand are made within work categories. Some work categories are explained on page four. For further explanation of individual work categories please refer to
the Land Transport New Zealand ‘Programme and Funding Manual’ on our website
http://www.landtransport.govt.nz/funding/programme-and-funding-manual/
ISBN: 0-478-28992-8
land transport road assets 4
Definition of terms (contd)
Area-wide Pavement Treatment (work category 2)
Area Wide Pavement Treatments are structural pavement treatments applied to substantial lengths
of roads, including large areas requiring digout and replace, or recycling.
Pavement Smoothing (work category 40)
This work category covers the smoothing of pavements for the benefit of road users. Examples include: thin asphaltic overlays or grader-laid asphaltic material; unbound granular overlays; treatments involving ripping and/or reshaping, including stabilisation of the existing pavement material;
certain urban treatments, where this is the most cost-effective option for pavement smoothing, including replacement of the kerb, removal and replacement of the existing pavement material.
Road Reconstruction ( work category 39)
This involves the reconstruction of existing pavements within the existing or widened road reserve or
deviations onto a new road reserve where the original road is closed. Examples include: realignment,
re-grading, widening, intersection improvements.
New Roads and Bridges (work category 38)
This covers the construction of a new road which is additional to the existing roading system and
may include new bridges.
Bridge Renewals (work category 35)
Work category 35 covers the following work: replacement of a structurally inadequate bridge; replacing a bridge for non-structural reasons, such as inadequate width or waterway; structurally modifying
an existing bridge to increase its structural capacity to a level higher than originally provided; widening an existing bridge.
Seal Extensions (work category 42)
Seal extensions involve sealing existing unsealed roads, including any reconstruction.
Construction projects
Construction projects cover the following work categories: traffic management; crash reduction studies; bridge renewals; new roads and bridges; road reconstruction; pavement smoothing; seal extension; transportations studies; strategy studies.
land transport road assets 5
ISBN: 0-478-28992-8
Physical road statistics for 2006
Kapiti Coast District
Wellington Region
Territorial authority
(TA)
Tota l roa d ne tw ork
(km)
Sta te Highw a y
Loca l
Se a le d roa d ne tw ork Sta te
(km)
Loca l
Sta te
Motorw a ys (km)
Loca l
Sta te
C ycle w a ys (km)
Loca l
Sta te
Tota l bridge s (#)
Loca l
Tota l bridge s (le ngth Sta te
m)
Loca l
Single la ne bridge s
Sta te
(#)
Loca l
Single la ne bridge s
(le ngth m)
Spe e d re stricte d
bridge s (#)
Spe e d re stricte d
bridge s (le ngth m)
W e ight re stricte d
bridge s (#)
W e ight re stricte d
bridge s (le ngth m)
Timbe r bridge s (#)
Timbe r bridge s
(le ngth m)
Sta te
Loca l
Sta te
Loca l
Sta te
Loca l
Sta te
Loca l
Sta te
Loca l
Sta te
Loca l
Sta te
Loca l
382
Highw a y
364
Highw a y
Highw a y
Highw a y
39
Highw a y
797
Highw a y
17
Highw a y
365
Highw a y
Highw a y
Highw a y
1
Highw a y
68
Highw a y
Highw a y
-
Region
Nation
236
10,895
3,882
236
3,146
19
26
136
636
9,970
3,146
1
249
82,565
10,838
49,811
171
302
3,983
13,589
138,937
236,386
175
7,337
125
5,953
2
48
8
531
39
670
12,885
141,372
12
137
948
4,197
3
491
324
12,055
15
914
843
11,355
Source: Territorial authorities and Transit NZ.
Note 1: All lengths rounded to whole metres.
Note 2: Regional and national figures include Department of Conservation and Waitangi Trust roads.
land transport road assets 6
ISBN: 0-478-28992-8
Road condition
Smooth travel exposure for all sealed roads in Kapiti Coast District
Smooth travel exposure (STE) %
100%
95%
90%
85%
80%
75%
70%
65%
60%
55%
50%
2000
2001
2002
2003
Year (ending June)
Kapiti Coast District - urban
NZ
Kapiti Coast District - rural
NZ
Kapiti Coast District - network
NZ
2004
2005
2006
territorial authorities - urban
territorial authorities - rural
territorial authorities - netwo rk
Note: the higher the smooth travel exposure (STE) % the smoother the network.
Source: RAMM information from Territorial authorities (does not include Transit NZ data).
Surface condition in Kapiti Coast District
100 - Condition index (100 - CI)
100
99
98
97
96
95
94
93
2000
2001
2002
Kapiti Coast District - urban
2003
2004
2005
2006
Y ear (ending June)
NZ territorial authorities - urban
Kapiti Coast District - rural
NZ territorial authorities - rural
Kapiti Coast District - netw ork
NZ territorial authorities - netw ork
Notes: the higher the value of 100 - condition index (CI), the fewer the defects in the sealed road surface.
CI and the routine for calculating it using the RAMM software, were introduced in the 2002/03 year.
Source: RAMM information from Territorial authorities (does not include Transit NZ data).
land transport road assets 7
ISBN: 0-478-28992-8
Pavement condition for all sealed roads in Kapiti Coast District
100 - Pavement integrity index
(100 - PII)
100.5
100
99.5
99
98.5
98
97.5
97
96.5
96
2000
2001
2002
2003
2004
Y ear (ending June)
2005
2006
Kapiti Coast District - urban
NZ territorial autho rities - urban
Kapiti Coast District - rural
NZ territorial autho rities - rural
Kapiti Coast District - network
NZ territorial autho rities - network
Notes: the higher the 100 - pavement integrity index (PII) value the better the pavement structural
condition. Pavement integrity index (PII) and the routine for calculating it using the RAMM software, was
introduced in the 2003/04 year.
Source: RAMM information from Territorial authorities (does not include Transit NZ data).
Road roughness for Kapiti Coast District
18
% lane km > 150 NAASRA
counts
16
14
12
10
8
6
4
2
0
2001
2002
2003
2004
2005
2006
year (ending June)
Kapiti Coast District
North Island total
W ellington Region
New Zealand total
Note: the higher the percentage the rougher the network
Source: RAMM information from Territorial authorities (does not include Transit NZ data).
land transport road assets 8
ISBN: 0-478-28992-8
Maintenance costs
Trends in road condition and structural maintenance spend for
Kapiti Coast District *
1.8
120.0
1.6
cost ($ millions)
1.2
80.0
1.0
60.0
0.8
40.0
0.6
0.4
percentage (%)
100.0
1.4
20.0
0.2
0.0
0.0
2001
2002
2003
2004
2005
2006
year (ending June)
structural maintenance ($M)
smoothness (STE)
pavement integrity (100 - PII)
surface condition (100 - CI)
Notes: the higher the percentage (%) the better the network condition.
* for maintenance funded through Land Transport NZ only. Land Transport NZ and Approved Organisation share.
Source: Land Transport New Zealand
Structural maintenance costs for Kapiti Coast District*
2.5
costs ($million)
2.0
1.5
1.0
0.5
0.0
2001
2002
2003
2004
2005
2006
year (ending June)
general maintenance
major drainage control
bridge maintenance
area-wide pavement treatment
reseals
pavement smoothing
Note: Regional Council and Transit NZ costs are excluded.
* for maintenance funded through Land Transport NZ only. Land Transport NZ and Approved Organisation share.
Source: Land Transport New Zealand
land transport road assets 9
ISBN: 0-478-28992-8
Asset use
Kapiti Coast District vehicle kilometres travelled on local roads
vehicle kilometres travelled (VKT)
(million km)
150
145
2007
projection
140
135
130
125
120
115
110
2000
2001
2002
2003
2004
2005
2006
year (ending June)
Kapiti Coast District
linear trend with projection
Source: Territorial authorities (does not include Transit NZ data).
Wellington Region vehicle kilometres travelled
12%
3,500
10%
3,000
8%
2,500
2,000
6%
1,500
4%
1,000
2%
500
0
0%
2001
2002
2003
2004
2005
year (ending June)
state highways
local roads
TA local roads as % of region local roads
all region roads as % of NZ
Source: Territorial authorities (TAs) and Transit NZ
2006
% of total
vehicle kilometres travelled
(VKT) (million km)
4,000
land transport road assets 10
ISBN: 0-478-28992-8
Work completed in 2005/06 (June year)
Kapiti Coast District
Wellington Region
Re se a ls
Pave me nt Smoothing
Roa d Re construction
Are a W ide P ave me nt
Tre a tme nt
Ne w Roa ds & Bridge s
Bridge Re ne w a ls
Se a l Exte nsion
Construction P roje cts
Comple te d
Sta te Highw ay
Local
la ne kms
la ne kms
kms
kms
me tre s
me tre s
kms
kms
kms
kms
kms
kms
kms
kms
la ne
la ne
la ne
la ne
la ne
Highw ay
Highw ay
Highw ay
Highw ay
Highw ay
Highw ay
No.
la ne
la ne
la ne
No.
la ne
No.
la ne
No.
la ne
No.
la ne
No.
Sta te Highw ay
Local
Sta te Highw ay
Local
Sta te Highw ay
Local
Sta te
Local
Sta te
Sta te
Local
Local
Sta te
Sta te
Local
Local
Sta te
Local
Source: Territorial authorities and Transit NZ.
Territorial
authority
(TA)
41.7
2.5
1.4
-
-
1
1.5
6
49.1
12.0
0.3
-
26.9
296.3
738.3
3.6
144.8
4
2,900.0
35
491.6
88
208.8
63
6.7
248.3
82.5
281.2
170.3
1,184.9
5,447.8
Nation
22.5
5
18.5
5
205
Region
27
ISBN: 0-478-28992-8
land transport road assets 11