sentences:  It was announced on 26 August 2008 that the steering group had advised the Government that a public-private partnership (PPP) - which would require a $2 toll per trip - was the best way of building the new $2 billion section of the city's Western Ring Route.Transport Minister Annette King asked officials to do more work on several critical factors before the Government committed to a PPP.In October 2008 the NZ Transport Agency released report findings which showed that tunnel emissions would have a negligible effect on local air quality.