I wonder if higher density living could lower costs for councils/cities. With more people living closer you would think less money needs to be spent on footpath

I wonder if higher density living could lower costs for councils/cities. With more people living closer you would think less money needs to be spent on footpaths and such, maybe less police because they are spread out less. Also makes me wonder what the maintenance costs of rail are. I don't know much about it but light rail tracks look like they would probably last a really long time without being replaced where as it seems roads hardly last a few years before needing to be resurfaced.