The 2011 Wellington Transport Strategy Model (WTSM) and Wellington Public Transport Model (WPTM) have been updated to a 2013 base year by Greater
Wellington Regional Council (GWRC), along with Traffic Design Group (TDG) and Prism Consulting. The re-basing of WTSM and WPTM has been documented in a series of Technical Notes (TNs) written over the course of the project.