Bunt & Associates was retained by VANOC to prepare an Olympic Travel Demand Model (OTDM) to assist in the preparation of Strategic Transportation Plans. The OTDM has also been used to support the transportation planning efforts of VANOC's partners including the City of Vancouver, the Ministry of Transportation, and TransLink.

The OTDM is unique in the sense that, although it uses the standard four-step travel demand forecasting process of trip generation; trip distribution; travel mode split; and trip assignment, it is a 24-hour, 17-day, 'venue-based' model. This means that Olympic travel demands are determined from the expected attendance at each event at each venue and 'back-calculated' to their origin.

Based on this structure, the OTDM calculates the anticipated amount of Olympic-related travel demand (known as the Olympic overlay), which can then be layered onto existing levels of travel on the transportation system to analyse the ability of key corridors to accommodate predicted traffic levels during the Games.

Given the evolving nature of Games planning, the model was constructed with the flexibility to ensure its longevity up to, and throughout the Games.

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