The Bureau of Transport and Regional Economics (BTRE) has recently completed an exercise in adjusting past SMVU freight data to make it consistent with the current survey methodology. From a consistency point of view, there are three major problem areas that need to be adjusted within what is called a “disaggregation correction” framework. These problem areas are: 1. adjusting vehicle stock numbers; 2. adjusting for overstating of vehicle kilometres travelled in the recall surveys before 1998, and 3. correcting the proportion of laden vehicles (especially in 1998 and 1999). This paper builds on the adjusted SMVU data at a national level by reviewing measurement methods for deriving time-series estimates of road freight over the period 1971 to 2003 for each State and Territory in Australia. Series are developed for freight tonne-kms for: 1. State of Operation total; 2. Interstate by State of Operation; 3. Capital City; 4. Rest of State. (a) For the covering entry of this conference, please see ITRD abstract no. E213716.
Samenvatting