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


The Auckland office of TDG is once again undertaking the Auckland Council Public Transport Surveys for 2012.   This entails a number of surveys to be carried out at various screenlines around Auckland (a screenline acts as a border and all patrons / vehicles that cross this line will be counted). The... Read more »

01 Detailed Traffic model

The western side of Christchurch has seen amplified growth following the earthquakes. The Hub Hornby is well located to service expansion in these areas and the re-development of the shopping centre is vital in providing high quality facilities and services. Traffic operation, access, and sustainable travel are key aspects of this... Read more »