The notorious intersection, which has seen multiple crash incidents over the years, will soon be partially blocked off with an extended median strip.

Motorists will have to get used to the traffic flow changes with a U-turn now only permitted at the intersection at Chambers Drive.

The roadworks have already caused confusion with some drivers.

And some Katherine business owners have voiced their concerns about the changes saying the public did not have a fair opportunity to provide alternative ideas and feedback on the plan.

Kathy Smale, the owner of Katherine Exposure Photographics, said her comments "fell on deaf ears".

The long-term business owner said she would have preferred to see traffic lights at the intersection.

"The public has not been informed enough," she said.

"The consultation process was not long enough and it was not advertised."

The work has blocked off lanes on the Stuart Highway, and motorists, including large caravans and campervans are making potentially dangerous moves to get from one side of the highway to the other.

A spokesman for the Department of Infrastructure, Planning and Logistics said works are progressing well on the Katherine Terrace/ Lindsay Street intersection upgrade.

"Traffic management signage is in place to ensure the safety of motorists and pedestrians during the construction period," he said.

"This signage is fully compliant and is audited several times per day to ensure continuity of safe traffic flows."

At 10am, after the morning rush to work, the Katherine Times recorded nine vehicles, in five minutes, making a U-turn at Chambers Drive.

The U-turn sees vehicles enter the Stuart Highway, one of Australia's most dangerous major roads, which stretches almost 3000km from Darwin to Port Augusta in South Australia.

The highway regularly sees large trucks and road trains.

This morning some of the nine vehicles dangerously turned into the busy highway, causing the oncoming traffic to have to slow down.

The $511,000 project began last week to make the busy intersection safer, by diverting feeder roads.

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