State Highway
T10:2012 Site Category 1b)
Traffic Signal Approach
Event Code E
State Highway
T10:2012 Site Category 1a)
Railway Level Crossing Approach
Event Code F
60 m
Traffic
signals
60 m
Crosswalk
60 m
State Highway
60 m
State Highway
Local road
Note: Extent of local road treatment to be agreed by the TLA/NZTA to ensure
the local road has appropriate skid resistance.
T10:2012 Site Category 1c)
Pedestrian Crossing Approach
Event Code C
T10:2012 Site Category 1d)
Stop and Give Way Intersection Approach
(where State Highway traffic is required to stop or give way including end of
ramps)
Event Code A/B
State Highway
Local road
60 m
State Highway
60 m
State Highway
60 m
Note: Extent of local road treatment to be agreed by the TLA/NZTA to ensure
the local road has appropriate skid resistance.
State Highway
T10:2012 Site Category 1e) and 3d)
Roundabout Approach and Circular Section
Event Code D and P
60 m
T10:2012 Site Category 1f)
One Lane Bridge Approach and Bridge Deck
Event Code B
60 m
Roundabout
Approach
State Highway
Local road
60 m
State Highway
Circular Section
Note: Extent of local road treatment to be agreed by the TLA/NZTA to ensure
the local road has appropriate skid resistance.
60 m
T10:2012 Site Category 2a), b) and c)
Divided Curves
Event Codes GU, G1, G2, G3 and G4
T10:2012 Site Category 2a), b) and c)
Undivided Curves
Event Codes GU, G1, G2, G3 and G4
Up to 400m radius
point
High risk
rural curve
State Highway
Medium risk
rural curve
Or Physical median barrier
e.g. guardrail
State Highway
Up to 400m radius
point
Up to
400m
radius
point
Event Codes H and I
T10:2012 Site Category 2e) and 3c) ii)
On Ramps with Ramp Metering and Approach to Motorway junction
On Ramp (with lane gain)
Event Codes O and M
Event code
Oapproach to
motorway
junction on
ramp
50 m
State Highway
T10:2012 Site Category 2d) and 3b)
Down Gradient > 10% and 5 – 10%
Event code M –
approach to ramp
metering
T10:2012 Site Category 3a) ii)
State Highway approach to Local Road Junction – Simple
Event Code J
60 m
State Highway
State Highway
T10:2012 Site Category 3a) i)
State Highway approach to Local Road Junction – Complex
Event Code J
60 m
Local road
Local road
60 m
Note: Extent of local road treatment to be agreed by the TLA/NZTA to ensure
the local road has appropriate skid resistance.
State Highway
State Highway
60 m
Note: Extent of local road treatment to be agreed by the TLA/NZTA to ensure
the local road has appropriate skid resistance.
60 m
T10:2012 Site Category 3c) i)
Approach to Motorway junction Off Ramp (without lane drop)
Event Code M/O
State Highway
T10:2012 Site Category 3a) iii)
State Highway approach to Local Road Junction – Staggered
Event Code J
Physical divide point
(e.g. kerb, crash cushion
etc.)
Local road
Local road
State Highway
Departure
type of ramp
to determine
skid
assessment
length
State Highway
60 m
Note: Extent of local road treatment to be agreed by the TLA/NZTA to ensure
the local road has appropriate skid resistance.
50 m
Note: Site Category of Ramp depends on the ramp configuration and may
include radius up to 400m and site category 1 at end.
EXAMPLE ONLY
EXAMPLE ONLY
T10:2012 Multiple Event Example
Traffic Signals and Medium Risk Curve
Event Codes E and G2
T10:2012 Multiple Event Example
Approach to Pedestrian Crossing and Local Road
Event Codes C and J
Approach to
pedestrian
crossing
IL
= 0.55
Approach to traffic
signal IL = 0.55 (60m)
State Highway
Up to 400m radius
point
60 m
60 m
<250m radius rural curve
(medium risk) IL = 0.50
Local road
Local road
Approach to traffic
signal IL = 0.55 (60m)
State Highway
60 m
Note: Extent of local road treatment to be agreed by the TLA/NZTA to ensure
the local road has appropriate skid resistance.
60 m
Approach to
local road
intersection IL
= 0.45
Note: Extent of local road treatment to be agreed by the TLA/NZTA to ensure
the local road has appropriate skid resistance.
EXAMPLE ONLY
T10:2012 Site Category 3c) i)
Approach to Motorway junction Off Ramp (with lane drop)
Event Code M/O
T10:2012 Multiple Event Example
Approach to Local Road and Low Risk Curve
Event Codes J and G4
Up to 400m radius
Physical divide point
(e.g. kerb, crash
cushion etc.)
Approach to
local road
intersection IL
= 0.45 (60m)
~350m radius rural curve
(low risk) IL = 0.40
State Highway
State Highway
Departure
type of ramp
to determine
skid
assessment
length
Note: Extent of local road treatment to be agreed by the TLA/NZTA to ensure
the local road has appropriate skid resistance.
50 m
Note: Site Category of Ramp depends on the ramp configuration and may
include radius up to 400m and site category 1 at end.
T10:2012 Site Category 2e) and 3c) ii)
On Ramps with Ramp Metering and Approach to Motorway junction
On Ramp (without lane gain)
Event Codes O and M
Event code
Oapproach to
motorway
on ramp
Event code M –
approach to
ramp metering
State Highway
50 m
Note: Site Category of Ramp depends on the ramp configuration and may
include radius up to 400m and site category 1 at end.