The seven-year-old girl successfully campaigned to have New Zealand's "sexist" road signs, which say "LINEMEN", changed to be more inclusive.
Zoe Carew spotted a "linemen" hazard sign - to warn drivers about workers repairing or installing electricity and telecommunications cables - when she was en route to her grandparents' house last month.
She said she felt this was wrong and was unfair to female workers and asked them if they agreed. "Do you agree?" Carew wrote in the letter.
"I don't really want to be a line-worker when I grow up because there are so many more exciting things I would like to do, but some girls might want to learn to be a linewomen", she wrote. Gammie also commended Carew "for taking action where you think something unfair should be fixed".
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Her mum wrote:'So proud of my 7yo.
Zoe's mum praised the decision by the NZTA and shared her pride in her daughter via Twitter.
While the chief executive said the NZTA agreed with Carew's opinion, he informed her that the term "line-workers" would require a bigger sign, and suggested "line crew" instead. High 5s all round!' The Transport Agency can include this change in its sign specific approvals, which will be published soon. The letter also mentioned that the change would take place once the old ones need replacement due to wear and tear.
"We were happy to take Zoe's suggestion on board, because great ideas can come from anyone, including seven-year-olds!" the agency tweeted. Gammie said it will take some time for all the signs to be replaced, as they will place the new ones when old ones are looking worn.