Each day we live our lives through a progression of journeys. Whether by car, bus, train, ferry, cycle or on foot, our journeys begin and are realised on an intricate network of road, rail or paths linking departure to arrival.

TDG is New Zealand’s largest specialist transportation engineering consultancy offering a full range of professional services in transportation: engineering, planning, modelling, analysis and design. With offices throughout the country, our work spans large and small developments, in both the private and public sectors. Wherever people and transportation meet, that's where we are. Making that meeting point better, is what we do.

Featured Projects


Dunedin, Napier and Rotorua City Councils. Traffic signals (lights) affect our day to day travels. Signals are considered to be a good form of intersection control, particularly in denser, busier urban networks. The majority of the traffic signals across New Zealand are managed by a system called SCATS (Sydney Coordinated Adaptive... Read more »

pedestrian surveys2

TDG has recently completed the 2012 round of annual Auckland Council pedestrian surveys within the Central Business District. This is part of a four year project running until 2014 and involves counting all pedestrian movements over a series of 24 hour periods at around 20 locations throughout the city. Using video... Read more »

    Latest News

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    New Senior Engineer for TDG
  • 20/08/2014 » We are pleased to welcome Jack Wan to the TDG Auckland team. » Read more »

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    Household Interview Survey
  • 05/06/2014 » You may find yourself asking, what is a “household interview survey”? These surveys collect data to understand how, where, and why people travel. » Read more »

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    Journeys - Summer 2014
  • 24/03/2014 » In this edition of Journeys we follow up on several projects featured in previous issues. TDG’s collaborative skills are to the fore in a number of affordable housing developments aimed at cooling Auckland’s overheated housing market. » Read more »