2007 Lexus IS 250 Owners Manual - Page 153

2-4. Using other driving systems CAUTION n Situations unsuitable for dynamic radar cruise control Do not use dynamic radar cruise control in any of the following situations. Doing so may result in inappropriate control of speed and could cause serious or fatal accident. l In heavy traffic l On roads with sharp bends l On winding roads l On slippery roads, such as those covered with rain, ice or snow. l Where there are sudden changes between sharp up and down gradients l At entrances to expressways l When weather conditions are bad enough that they may prevent the sensors from functioning correctly (fog, snow, sandstorm, etc.) l Where buzzer can be heard often n When the radar sensor may not be correctly detecting the vehicle ahead Apply the brakes as necessary when any of the following types of vehicles are in front of you. As the sensor may not be able to correctly detect these types of vehicles, the proximity alarm (→P. 344) will not be activated, and an accident may result. l Vehicles that cut in suddenly l Vehicles traveling at low speeds l Vehicles that are not moving l Vehicles with small rear ends (trailers with no load on board etc.) l Motorcycles traveling in the same lane 140