The board of directors responsible for the Golden Gate Bridge has voted to commission the first phase of a US$2 million study into physical deterrence of suicide attempts. The initial project is expected to take six months and cost US$625,000. It will include a review of earlier studies carried out both for the Golden Gate and other long-suspension bridges. Output will include a report identifying concepts to take forward for wind tunnel testing and further studies. Generic design concepts are expected to fall into three categories: