I personally wonder why they don't go with accessible infastructure tunnels like old city sewer systems instead of having to dig up roads for wires and pipes. T

I personally wonder why they don't go with accessible infastructure tunnels like old city sewer systems instead of having to dig up roads for wires and pipes. The two obvious "why nots" I can see are the initial expense of such tunnels and rodents or other pests damaging it.