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TECHNICAL NOTE ACT DATA


INTRODUCTION

1 A minor error in the calculation of registered motor vehicles for the Australian Capital Territory was identified for previous years. This Technical Note outlines the problem and the likely impact on vehicle registration numbers in ACT for MVCs conducted from 31 March 2004 to 31 March 2007.


ISSUE

2 Vehicles on register are defined as those vehicles registered at the date of the census, or had registration expire less than one month before that date. For ACT however, vehicles for which registration expired prior to 31 March were incorrectly removed by processing systems used before MVC 2008.


IMPACT

3 For each MVC conducted from 2004 to 2007, approximately 2% of ACT registrations had been omitted. The error has had little impact on ACT annual fleet growth rates.

4 The impact of the error on ACT data has been estimated in the following table.

ACT registrations, Type of vehicle - Census years
	2004	2005	2006	2007
Vehicle type(a)	no.	no.	no.	no.
Additional registrations
Passenger vehicles	3 893	3 864	3 988	4 160
Campervans	19	13	22	21
Light commercial vehicles	523	502	567	572
Light rigid trucks	13	18	16	16
Heavy rigid trucks	34	42	31	35
Articulated trucks	5	4	4	8
Non-freight carrying trucks	1	4	-	1
Buses	15	6	11	14
Motor cycles	352	423	444	462
Total motor vehicles	4 855	4 876	5 083	5 289
Revised motor vehicle registrations
Passenger vehicles	189 496	192 505	195 751	200 015
Campervans	526	518	496	480
Light commercial vehicles	19 399	19 974	20 755	21 347
Light rigid trucks	642	627	643	651
Heavy rigid trucks	1 763	1 729	1 755	1 724
Articulated trucks	241	242	239	233
Non-freight carrying trucks	102	96	97	89
Buses	931	929	957	948
Motor cycles	7 444	7 808	8 466	9 147
Total motor vehicles	220 544	224 428	229 159	234 634
- nil or rounded to zero (including null cells)
(a) Estimates only. Based on motor vehicle registry broad vehicle descriptions.