Development will thus be funnelled to areas covered by the existing transport infrastructure or where public transport infrastructure is planned under the mobility master plan. The cost to the city of making land available for public infrastructure, such as roads, public transport, parks and facilities for energy, water, wastewater and solid waste treatment, w'ould be prohibitive as urbanisation advances. One option would be to create a supplementary plan under the current city master plan that identifies the land necessary for public services and could specify measures explaining how to acquire this land or make it available on a timeline. The city could also require private developers to provide land for public services or pay fees at the time of development.