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


TDG was New Plymouth District Council’s and NZTA’s appointed consultant for the recent New Plymouth Transport Study.  The purpose of the study was to develop a long-term strategy for upgrading the district’s road network to cater for future traffic volumes and to develop a traffic plan for managing the existing... Read more »

4 AsBuiltPegasus Entrance

Wamakariri District has one of the fastest growing populations in the country. Statistics New Zealand indicate the District’s population will grow each year by 1.6% between 2006 and 2031, which makes it the third fastest growing district in the country. The Pegasus Town development is a complete new town environment,... Read more »