PROJECT TYPE (A) MEAN COST OVERRUN (%)* (B) % OF PROJECTS IN TAIL (≥ 50% OVERRUN) (C) MEAN OVERRUN OF PROJECTS IN TAIL (%) Nuclear storage 238 48 427 Olympic Games 157 76 200 Nuclear power 120 55 204 Hydroelectric dams 75 37 186 IT 73 18 447 Nonhydroelectric dams 71 33 202 Buildings 62 39 206 Aerospace 60 42 119 Defense 53 21 253 Bus rapid transit 40 43 69 Rail 39 28 116 Airports 39 43 88 Tunnels 37 28 103 Oil and gas 34 19 121 Ports 32 17 183 Hospitals, health 29 13 167 Mining 27 17 129 Bridges 26 21 107 Water 20 13 124 Fossil thermal power 16 14 109 Roads 16 11 102 Pipelines 14 9 110 Wind
...more
