Risk on the cost side for public agencies is also contained since most of the services to-date are time bound pilots with fixed budgets for subsidy payments - once the money runs out, so too does the service unless additional funds are allocated through the budget process. And the pilots typically allow public agencies and operators to enact sometimes substantial cost savings. Revenue estimates also oftentimes correctly assume a rise in ridership linked to the greater convenience and contained costs of services offered - especially in comparison to the pre-existing public transport-alone offer.