"The ongoing changes are to allow for the safe delivery of concrete bridge segments from the pre-cast facility at Jeremadra, south of Mogo, to the Batemans Bay Bridge replacement construction site," a spokesperson said.

"The segments will be delivered to site along the Princes Highway to Batemans Bay from Wednesday, July 22, weather permitting.

"A total of 166 segments will be delivered under NSW Police escort between 6am and 7am, 9.30am and 2.30pm and 4.30pm and sunset during weekdays and between 6am and 8am on Saturdays, weather permitting.

"To minimise impacts to motorists and the community, the deliveries will not occur during peak holiday periods, at night or on Sundays and public holidays.

"The deliveries will also avoid bridge opening times of 11.45am and 2.20pm."

The spokesperson said the deliveries would continue for most of the rest of the year.

"Delivery is expected to continue until late 2020 and motorists can check Live Traffic NSW for updates," the authority said.

"All road users should follow the direction of the NSW Police escort if they are travelling during segment delivery times.

"Motorists may experience delays of up to 10 minutes due to slower truck speeds and reduced speed limits of between 60 km/h and 80 km/h on sections of the Princes Highway, and may also experience intermittent delays due to trucks crossing bridges at reduced speeds of 10 km/h along the delivery route.

"Motorists are advised to drive to the conditions, safely use designated overtaking lanes and follow the directions of signs and traffic control.

"Transport for NSW thanks road users for their patience during this time.

"For the latest traffic updates download the Live Traffic NSW App, visit livetraffic.com or call 132 701."