As we head into the "most treacherous" months for driving, motorists have been warned to adjust their driving to keep themselves and other road users safe.

Winter weather has begun to settle in and with it come a range of risks - fewer daylight hours and wetter, more slippery roads.

In Tauranga overnight there were six crashes in just 10 hours, four of which happening within half an hour of each other in the poor weather.

Read more: Inattentive drivers to blame for cluster of crashes

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The NZ Transport Agency has launched its Winter Journeys campaign which encouraged drivers to plan ahead to reduce winter driving risks.

"The room for mistakes is reduced when road and weather conditions are less favourable, and we don't want anyone's mistake to end in an avoidable tragedy," Ernst Zollner, the agency's road safety director, said.

"There are more vehicle crashes during June and August when motorists are likely to encounter fewer daylight hours and wetter, more slippery roads."

Mr Zollner said the simple guidelines for travelling in winter were to ensure your vehicle was safe, driving to the conditions, allowing extra time for travel, slowing down, and allowing greater following distances.

"Most important though is to plan your journey, check weather and road conditions, choose the safest route if you have the option and if possible avoid travelling in extreme weather and road conditions.

"And remember road closures and restrictions are put in place for your protection and other road users, so please observe these."

Roadworks that are scheduled to start in the next week or are currently underway are detailed below to help people plan ahead when travelling.

SH2 Chapel Street Viaduct Tauranga

Contractors carrying out maintenance on the viaduct from June 19 through to June 23 and motorists are advised to drive with extra care and attention.

The work will be carried out at night between the hours of 7pm and 6am to avoid major delays to traffic. One lane will be closed and speed restrictions will be in place.

SH2 Bethlehem

Transport Agency contractors will be carrying out 'mill and fill' works on a section of SH2 Bethlehem overnight on June 15 and 16.The work involves digging up a section of road and layering hot asphalt to repair the road surface. One lane will be closed during the work and speed restrictions will be in place. The work is being carried out between the hours of 7pm and 6am to reduce the impact on traffic. Drivers are urged to drive with care and expect minor delays during work hours.

SH2 Te Puna Roundabout

Contractors have started stage one of the roundabout project which includes surveying and locating services such as power, water, stormwater and sewerage. The work is mainly offline and is not expected to significantly impact traffic on SH2 in the short term. The main part of the work, including construction of the roundabout, will get underway in September.

SH2 Snodgrass Road

Transport Agency contractors are carrying out 'mill and fill' works on a section of SH2 near Snodgrass Road from June 19 until June 23. The work involves digging up a section of road and layering hot asphalt to repair the road surface. The work will be carried out each night from 7pm to reduce the impact on traffic. Drivers are urged to drive with extra care and adhere to speed restrictions and other traffic management that will be in place.

SH2 between Tauranga and Waihi

Motorists travelling on SH2 between Tauranga and Waihi are urged to drive with extra care as work continues on a major safety upgrade.
A section of highway between Wainui South Road and Sargent Drive is being repaired and widened, and a wire rope central median barrier installed to prevent head on crashes.
A 50km/h speed restriction is in place for the safety of workers and people are urged to stay alert behind the wheel as there will be changes to the road layout. The work is expected to be completed this month.

SH29/ Takitimu Drive and SH36/Taurikura Drive roundabout upgrade

Motorists are asked to drive with extra care when travelling through the roundabouts over the next two months. Tauranga City Council's contractor is carrying out works and speed restrictions, lane closures and occasional stop/go traffic management will be in place at times.