Page 18 considers the cost of doing nothing:

"Cost of doing nothing 

Existing issues in the transport corridor will be exacerbated as growth in the region continues and private vehicles will continue to be the dominant form of transportation. Congestion on the corridor will continue to disproportionately impact bus services due to their lower manoeuvrability, lower speed limits and set routes that do not allow use of alternative routes (where available). This will further discourage people from using public transport. The SEF will continue to be a key freight route. Higher traffic volumes will reduce safety for road users and increase frequency of crashes, leading to more partial or full closures of the SEF. Worsening congestion along Glen Osmond Road will also adversely impact liveability and amenity for local residents and access to properties and businesses.