The Back Injury Risks in Driving (BIRD) Tool is designed to collect information that will help determine the issues that present the greatest risk of back injury and discomfort to drivers and provide pointers to improvements that may be made to reduce those risks. The HSE says many factors may be responsible, either alone or in combination, for lower back pain and injury among workers involved with driving activities. These include posture, twisting and manual handling and exposure to vibration (see pages 124-125).