Gabites Porter Consultants (GPC) is a leading provider of specialist transport planning and engineering services. Our team of highly skilled transport planners and traffic engineers have built a solid international reputation for delivering high quality advice using the latest technology.

This site has been designed to demonstrate our capabilities and experience. Please take time to browse through the site either using the links below or the site navigating panel at the top of this page:


Changes Are Afoot

Thursday, Mar 14 2013

Changes are afoot at Gabites Porter Consultants and Traffic Design Group to harness the power of two.

You know us here at Gabites Porter for our specialist skills and abilities in the development and application of transportation models throughout New Zealand and in Australia.

And maybe you know Traffic Design Group for their considerable experience and expertise in meeting a broad range of transportation engineering and analysis needs. Both of our firms are known for being at the leading edge; for enduring commitment to our clients over many decades; and for reliable and robust advice.

These things aren’t changing. In fact, they’re about to take a quantum leap…

Gabites Porter Consultants and Traffic Design Group have joined forces. In effect, we have brought together New Zealand’s largest specialist transportation planning firm with New Zealand’s largest transportation engineering firm. The result is an organisation that is able to provide an unmatched wealth of experience and capability in all areas of transportation: modelling, planning, analysis, engineering and design.

With this change comes a new name.

From now on in New Zealand we’ll be using the name TDG.

And in Australia, TDG Gabites.

Bigger company. Smaller name. Greater impact.

For more information on this exciting new development, contact Grant Smith at +64 (21) 338229, or

For more information regarding Traffic Design Group, go to

Grant Smith Elected Fellow of IPENZ

Friday, Mar 16 2012

Grant Smith is elected a Fellow of IPENZ for his contribution to the advancement of engineering practice.

We recognise his contribution to transportation planning and modelling methodologies.
He was the major developer of a suite of transportation modelling and planning software which is now used internationally.
His expertise has been widely sought by state road authorities and local government both nationally and internationally, and he has contributed his knowledge to the sector through a number of technical papers.
He has been actively involved in the activities of the Transportation Group.