Volvo XC90 has a few safety features that help you avoid accidents and stay in control. They include the emergency brake light, which helps alert vehicles approaching you from behind if you are forced to emergency brake. In this situation, the brake lights will flash at an intense rate of four times.
Another feature is the forward collision detection system that makes a sound whenever it detects an impending collision. This warning can be heard for about five seconds before the alarm goes off. This helps to alert the driver early enough to make a corrective maneuver.