Rules for Applying Traffic Counts to Static Billboard Sites to Provide Daily Traffic Visuals.

CRITCHLOW LIMITED

Everything that happens, happens somewhere. The value is knowing where.

Everything that happens, happens somewhere. The value is knowing where.

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TABLE OF CONTENTS

1.   OBJECTIVE ............................................................................................................... 3  

2.   DATA SOURCE ......................................................................................................... 3  

3.   RULES ....................................................................................................................... 3  

3.1.   ORIENTATION ..................................................................................................................................... 3  

3.2.   VIEWING DISTANCE ........................................................................................................................... 4  

3.3.   ONE WAY ROADS ............................................................................................................................... 4  

3.4.   SEQUENTIAL ROAD CARRIAGEWAY SECTIONS ............................................................................ 4  

3.5.   ROADS MAINTAINED BY NEW ZEALAND TRANSPORT AUTHORITY (NZTA) ............................... 4  

3.6.   LINE OF SIGHT ................................................................................................................................... 4  

3.7.   BOARD HEIGHT .................................................................................................................................. 4  

3.8.   SIGNS INSIDE PRIVATELY OWNED COMPLEXES .......................................................................... 4  

3.9.   VEHICLE OCCUPANCY ...................................................................................................................... 4  

3.10.   SUBJECTIVITY FILTER ....................................................................................................................... 5  

3.11.   RULES .............................................................................................................................................. 5-8  

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1. OBJECTIVE

To create an industry framework for calculating standardised gross billboard traffic visual impressions based on road traffic data within the NZ Outdoor Advertising sector. The output will be a Daily Traffic Visual (DTV).

2. DATA SOURCE

Traffic count data must be sourced from a common, consistent, updateable and auditable source:

1. Critchlow combine latest traffic counts from current RAMM (road asset maintenance and management) databases maintained by all road controlling authorities.

2. Critchlow provide a nationwide spatial view of traffic counts aligned by length and surface width to accurate road centrelines, with road names labelled, and identifying one-way streets with travel direction.

3. Critchlow spatial view of RAMM traffic counts enables counts to be extracted by proximity to Billboard sites.

4. At this stage pedestrian counts will be excluded from traffic counts due to lack of available data.

5. At present no councils are producing bi-directional data for two way roads. It is envisaged that as this becomes available in the future it will be incorporated into the dataset.

3. RULES

3.1. ORIENTATION Rules for inclusion of traffic counts are as follows:

Orientation description Rule

Billboard perpendicular to road Include half traffic count (traffic direction approaching sign)

Billboard parallel to road Include whole traffic count for parallel road if billboard is clearly visible in both directions from the street level

Billboard angled to road Include half traffic count (traffic direction approaching sign)

The following diagrams illustrate these viewing angles:

Perpendicular sign

Parallel sign

Angled sign

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3.2. VIEWING DISTANCE Maximum distance from billboard to road carriageway section is a standard of 150 metres. There may be exceptions where a very large or very high billboard may be visible from road segments further away. In this case Critchlow will make the judgment call of which road segments will be included whilst still applying the same rules. If the client disagrees they can appeal the decision to the OMANZ Executive.

3.3. ONE WAY ROADS Where traffic counts are included from one way road carriageway sections, the entire count for that segment (1 Multiplier) will be included in the overall total. This only occurs where the direction of travel is towards the billboard.

3.4. SEQUENTIAL ROAD CARRIAGEWAY SECTIONS The counts included for each site must not be derived from sequential road carriageway sections i.e.: the same traffic cannot be counted more than once for the same site.

3.5. ROADS MAINTAINED BY NEW ZEALAND TRANSPORT AUTHORITY (NZTA) Where a road segment has a traffic count from both NZTA and the local city or district council, then the NZTA count should be used in preference to the local authority count.

3.6. LINE OF SIGHT Each road carriageway section that is included for counting purposes must have a clear line of site to the billboard which must include at least 80% of the board.

3.7. BOARD HEIGHT Board height from street level has an influence on line of site as it affects the viewing angle. This may mean the board is not easily viewable from the road that is immediately parallel to the board. This should be checked via field validation and taken into account when assigning road carriageways to be counted. At this stage, sign height is not included in the required data.

3.8. SIGNS INSIDE PRIVATELY OWNED COMPLEXES Where signs are located within a privately owned complex such as a shopping centre, large car park or airport, counts may be sourced directly from the premises owner.

3.9. VEHICLE OCCUPANCY The industry has traditionally assumed a vehicle passenger occupancy rate of 1.6. This is supported by Ministry of Transport data in the following reference: http://www.transport.govt.nz/ourwork/TMIF/Pages/TV010.aspx

All traffic counts derived from RAMM traffic counts (representing average daily vehicle counts) will therefore be multiplied by 1.6 to derive the final DTV value.

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3.10. SUBJECTIVITY FILTER It should be accepted by the industry that a degree of subjectivity is required to apply the rules. The guiding principle should be that a car driver / passenger have a reasonable opportunity to see the billboard from each road carriageway section that is included in the traffic count for the site.

3.11. RULES A multiplier will be used on the traffic counts.

1 Multiplier - Used for one way streets or two way streets where the Billboard can be seen from both sides. This takes the full traffic count numbers on the road segment.

0.5 Multiplier - Used for two way streets where only one side of the street can see the billboard. This takes half the traffic count numbers on the road segment.

In the following diagrams, the road carriageways shaded green represent those where traffic may be counted for the sign orientation shown:

Key

Billboard (Arrow indicates direction board is facing)

Road carriageway from which traffic has been counted

Road Carriageway from which traffic has not been counted

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1. Two way road, perpendicular sign 2. Two way road parallel sign

0.5 Multiplier

1 Multiplier

3. Two way junction, parallel sign 4. Dual carriageway roads, T junction, parallel sign

1 Multiplier

1 Multiplier

5. Two way roads T junction, angled sign 6. Dual carriageway roads, T junction, angled sign

0.5

0.5 Multiplier

0.5 Multiplier

1 Multiplier

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7. Two way crossroads, perpendicular sign 8. Dual carriageway crossroads, perpendicular sign

9. One way crossroads, parallel sign 10. One way crossroads, perpendicular sign

11. Two way crossroads, angled sign 12. Dual carriageway crossroads, angled sign

1 Multiplier

1 Multiplier

0.5 Multiplier

0.5 Multiplier

1 Multiplier

1 Multiplier

0.5 Multiplier

1 Multiplier

1 Multiplier

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13. Two way crossroads, perpendicular sign facing away from crossroads

14. Dual carriageway crossroads, perpendicular sign facing away from crossroads

15. Two way crossroads, angled sign facing away from crossroads 16. Dual carriageway crossroads, angled sign

17. Motorway and off ramp facing sign perpendicular to Motorway

0.5 Multiplier

1 Multiplier

0.5 Multiplier

1 Multiplier

1 Multiplier

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