yes... there is currently not much traffic around that area. But our government can see the future... they know all the farmland around that areas are now owned by the main developers and they planned to build lots of the managed type villas. So, the government is taking the advance step in building up the roads and allowing the development to go smoothly and faster.
At the same time, widening the Kam Sheung Road and Kam Tin Road is not an easy task, including lots of tree felling and land reclaimed. Building road on the channels by covering up the drainage is much easier.