The Mayfield motor registry, which has operated for more than 20 years, would close later this year, an RTA spokesman said this week.

It would be amalgamated with Newcastle's registry, which would move to premises about 100 metres from its current Parry Street site.

No jobs would be lost, and the new site's opening hours would be the same, the spokesman said.

The current Newcastle office was "very old" and the lease for Mayfield, about five kilometres away, would expire this year.

"The new combined motor registry will deliver the full range of RTA transactions in a modern service environment and will be much better for customers," he said.

It would "offer the latest design features, including improved public seating, newly designed transaction counters and a voice-automated queuing system".

Plans to close Mayfield follow the loss of the Charlestown and Cardiff motor registries, which were replaced with a new office at Warners Bay in mid-2009.

Port Stephens MP Craig Baumann said many elderly people lived in the Mayfield area and the registry closure would require them to travel into the city.

"The Government should be investing in services in Mayfield, not taking them away," he said.

Mayfield Mainstreet Committee co-ordinator Kathie Heyman said residents would have to pay for parking near the Newcastle office, whereas Mayfield had free parking and was easily accessible.

Public Service Association organiser Brian Turner said the closure was a cut to services, and believed other regional registries would go.

Unions NSW deputy assistant secretary Adam Kerslake said the closure highlighted union concerns about the reduction of public services.

Public sector unions will launch a campaign in Newcastle next Wednesday calling for an improvement to public services.