Chapter 38 Security, Navigation, and Advanced Driver Assistance Systems 511 Copyright Goodheart-Willcox Co., Inc. Steering responsive headlight systems use sensors with the headlights to swivel the lights as the vehicle turns. Night Vision Systems Typical night vision systems (NVS) use thermal imag- ing, or passive night vision, to help drivers see objects on the road. The forward-facing sensors on the vehicle analyze the heat from objects ahead of the vehicle. The images produced may be displayed on the display moni- tor or as a heads-up display (HUD) in front of the driver. Some systems highlight pedestrians and animals with graphics to catch the driver’s attention. Night vision systems also improve driver visibility through hazardous weather conditions, such as fog, snow, and rain. See Figure 38‑13. According to manu- facturers, some systems can see ahead as far as 1,000′, which is almost twice as far as headlight illumination. Active night vision uses infrared light sources to illumi- nate the area in front of the vehicle. Active Parking Assistance Systems Active parking assistance systems may be semi- automated or fully automated. Systems may be capable of parallel and/or perpendicular parking. These systems may also have a parking obstruction warning to alert drivers of objects near the vehicle when parking. The vehicle’s movements can be seen on the monitor as it backs into a parking spot, Figure 38‑14. An automatic parking system uses computer control to back up, steer, and brake a car into a parking space. The driver simply pulls up next to a parking space, activates auto park, and the car drives itself into the parking space between two cars. This system may also be called a parking assist system. otomobil/Shutterstock.com Figure 38-12. A dash light will flash or the steering wheel may vibrate to alert the driver or the steering system may take over and move the car back to the center of its lane. Many cars use the monitor in front of the driver to indicate that the feature is engaged. Yauhen_D/Shutterstock.com Figure 38-13. Night vision helps the driver identify objects, such as human beings or large animals, while driving at night. The system may display the images on the display monitor or as a head-up image in front of the driver. supergenijalac/Shutterstock.com Figure 38-14. An automatic parking system uses the vehicle’s proximity sensors and cameras to measure distance to objects around the vehicle. It then operates the engine throttle, brakes, and steering to park the car with minimum human intervention. The parking assist system can back the car into a space, as well as perform parallel parking. When using this feature, the driver removes his or her hands from the steer- ing wheel and removes his or her feet from the brake and gas pedals. Chesky/Shutterstock.com