Core indicator information
| Nature of data |
Quantitative, survey-based. |
| Data source |
Ratio of survey reported bus and train trip legs to driver trip legs. |
|
1989/90 data from New Zealand Household Travel Survey 1989/90, Ministry of Transport (N=8700 fully responding people). |
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1997/98 data from New Zealand Household Travel Survey 1997/98, Land Transport Safety Authority (N=14250 fully responding people). |
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From 2003, Ongoing New Zealand Household Travel Survey, Ministry of Transport. Sample survey of 4600 households per year (2200 households per year prior to June 08), running throughout the year. Respondents report all travel in a specified two-day period. See www.transport.govt.nz/ongoing-travel-survey-index/ for more information. |
| Note re 2003-7 and 2004-08 |
In 2009, the Ongoing Household Travel Survey dataset was revised to ensure professional driver trips were excluded where possible. This has resulted in revision to the 2003-07 and 2004-08 figures above. |
| Definition |
Bus and train trip legs include all reported bus and train travel including long distance services and school bus services. |
|
Driver trip legs include all vehicle types including cars, vans, utes, SUVs, trucks, buses and motorcycles. |
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A trip leg is a surveying unit of non-stop travel by a single mode for a single purpose. For example, walking to work with a stop at the shop is two trip legs. |
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The NZ Household Travel Survey is designed to capture household travel only and excludes most commercial and freight travel. |
| Frequency |
1989/90 ; 1997/98. From 2003, updated annually with four year moving average. Periods run from July to June so 2003-2007 means July 2003 - June 2007. |
| Disaggregation |
Metropolitan areas are equivalent to Statistics NZ Major Urban Areas. As well as the core cities, Auckland includes Papakura, Orewa and Waimauku; Wellington includes Kapiti; Christchurch includes Lyttelton, Governors Bay and Kaiapoi. |
| Timeliness |
Updated in October/ November each year. |
| Quality of the data |
Survey based. Household Travel Surveys exclude commercial travel, and tend to somewhat underestimate total personal travel. Confidence intervals will be published in 2010. Response rate (households with full responses from all members): 1989/90=75%; 1997/98=75%; Ongoing survey: 65%-70%. |
| Availability of forecast data |
No |