Traffic Design Group (TDG) was a consultancy in New Zealand. The largest specialist traffic engineering and transport planning consultancy in the country, they had offices in Auckland, Tauranga, Hamilton, Hawke's Bay, Wellington, Nelson, Christchurch and Queenstown and are nationally recognised in their field. The company has been active in the New Zealand transport sector since 1976. TDG was acquired by Stantec in 2018.