The private company was at risk of not recuperating their costs, but ultimately the Dartford scheme demonstrated that the Ryrie Rules were no longer a barrier to the private financing of public infrastructure projects.
私人公司承受着无法收回成本的风险，不过最终达特福德方案表明“莱利法则”不再是公共基础设施项目私人融资的障碍 。