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The Smart (secure mobile access and reporting technology) device is being trialled by Southern Districts police for one month.
Southern District road policing manager Inspector Andrew Burns said about 50 staff had been trained to use the PDA device, which allowed information about vehicles and their drivers to be accessed quickly following a traffic stop.
It meant officers could access information directly rather than going through the three police communications centres.
"There will be no change to the information that is collected or stored -- the technology will simply allow us to do what we've always done more efficiently," Mr Burns said
The device would also eliminate repetition and avoid issues such as legibility of handwriting and incomplete information, he said.
"The public will notice very little change in the way an infringement notice is issued. The same information will be presented to them, but it will be captured in a computer generated print-out."
Mr Burns said data protection law applied to Smart records and the trial would be reviewed before a decision was made on whether the technology was suitable for use nationwide.