The 2011 Acura RL scores well in most assessments of safety—especially with respect to features and accident avoidance—but a few points keep it from being called one of the safest vehicles in this class. While the RL hasn't at all been tested by the National Highway Traffic Safety Administration (NHTSA), the IIHS has put the car through its paces and gets to "Good" marks in front, side, rear impact tests, but fell down in the new roof-strength test. According to the IIHS, it had the worst results in the category of any model tested, and resulted in a higher-than-typical chance of injury during a rollover crash, which is a relatively rare occurrence in a low-slung sedan.
But all the standard safety features are here, and more. Six airbags are standard, plus active front headrests, electronic stability control, and anti-lock brakes, and radar-based cruise control and automatic curve-following headlights are available. Acura's Collision Mitigation Braking System also detects potential rear-end collisions from its location behind the front grille, warns the driver, then initiates automatic braking, using millimeter-wave radar technology to keep track of vehicles ahead. CMBS is bundled with adaptive cruise control (ACC), which adapts speed and distance to the vehicle in front.