Lyla Lindsey
Adaptive cruise control (ACC) is an advanced driver-assistance system that automatically adjusts a vehicle's speed to maintain a safe distance from vehicles ahead. It is a more sophisticated version of the traditional cruise control system, which requires the driver to manually adjust their speed in response to surrounding vehicles. ACC uses sensors, lasers, cameras, or radar to gather information and adjust the vehicle's speed accordingly. This technology is now widely available and can be found in various car models, including hatchbacks and luxury vehicles. While it is not a self-driving system, ACC can enhance safety, convenience, and road capacity by reducing driver errors and maintaining optimal separation between vehicles.
| Characteristics | Values |
|---|---|
| Definition | A more sophisticated version of the speed-maintaining cruise-control system. |
| Function | Maintains a safe distance from the vehicle ahead by automatically adjusting the vehicle's speed. |
| Mechanism | Uses laser sensors, cameras, or radar to monitor the speed and distance of the vehicle ahead. |
| Features | Can include a "stop and go" function, which brings the vehicle to a stop in heavy traffic and accelerates back to the set speed when the traffic moves. |
| Benefits | Reduces driver stress and fatigue, enhances safety, and improves fuel economy. |
| Limitations | May not be accurate in bad weather, and different systems have varying reaction times. |
| Car Models | Subaru Impreza, Honda Civic, Hyundai Elantra, Toyota Corolla, Subaru Crosstrek, Maserati GranCabrio, Kia, Chevrolet Tahoe, Nissan ProPilot, Cadillac's Super Cruise, Mercedes-Benz S-Class. |
| Cost | Between $500 and $2500, depending on the type and model of the car. |
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What You'll Learn
How does adaptive cruise control work?
Adaptive cruise control (ACC) is an advanced version of cruise control that maintains both the speed and following distance set by a driver. It is a semi-autonomous system that allows the driver to set a maximum speed and then accelerates and decelerates the car in response to other vehicles to maintain this speed.
ACC uses advanced sensory technology, such as radar, cameras, and laser sensors, to determine the speed and proximity of the vehicle in front. The driver can set the speed and following distance using controls on the steering wheel, and the ACC system will then work to maintain these settings. For example, if the car in front moves lanes, the ACC will accelerate until it reaches the set maximum speed or the desired gap from the car in front.
In addition to maintaining speed and distance, ACC can also include a "stop and go" function. More advanced ACC systems can bring the vehicle to a full stop in heavy traffic and then accelerate back to the set speed once the traffic starts moving again. This feature is particularly useful in traffic jams and can help reduce driver stress and fatigue.
It is important to note that ACC systems can vary in sophistication and functionality across different car models and carmakers. They may also be affected by adverse weather conditions or quick lane changes, and may not always work in tunnels or on curving or hilly roads. Drivers should be aware of the specific functionality of their ACC system and be prepared to take control manually if necessary.
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Advantages and disadvantages
Adaptive cruise control (ACC) is a system designed to help vehicles maintain a safe following distance and stay within the speed limit. This system adjusts a car's speed automatically so that drivers don't have to. ACC is available in an increasing number of cars, from small hatchbacks to luxury vehicles.
Advantages
Adaptive cruise control has several advantages, including:
- Safety: ACC can increase road safety by helping vehicles maintain a safe distance from the car in front and preventing accidents caused by close following distances.
- Traffic flow: By maintaining optimal separation between vehicles, ACC can help maximize traffic flow and reduce driver errors.
- Driver focus: With ACC, drivers can focus more on their surroundings and less on maintaining a safe speed.
- Driver comfort: ACC can reduce driver stress and fatigue, especially in congested motorway traffic.
- Partial automation: ACC is a form of partial automation that can reduce the workload of the driver, although it does not provide full autonomy.
Disadvantages
There are also some limitations to ACC:
- Not fully autonomous: ACC does not provide full autonomy, and drivers still need to practice safe driving habits that work in tandem with the technology.
- Sensor limitations: Adverse weather conditions, such as snow, rain, or fog, may confuse the system's sensors, as can environmental factors such as driving through tunnels.
- Cost: The cost of an ACC system can vary depending on the number of features included, ranging from $500 for basic systems to $2,000-$2,500 for systems with all available features.
- Overrun: Less sophisticated ACC systems can 'overrun' down declines, gaining speed beyond the selected speed.
- Inclusion in trim packages: ACC is often included in a trim level or driver-assistance package, which means buyers may have to pay for additional features they do not want or need.
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Cars with adaptive cruise control
Adaptive cruise control (ACC) is a type of advanced driver-assistance system that automatically adjusts a vehicle's speed to maintain a safe distance from the vehicle ahead. It is a more sophisticated version of the traditional cruise control system, which requires the driver to manually adjust their speed in response to the vehicles around them. ACC uses sensors, lasers, cameras, or radar to gather information about the vehicle in front, and will then brake or accelerate accordingly.
ACC technology is becoming increasingly common, with many different car models now offering it as a feature. For example, the Subaru Impreza, Honda Civic, Hyundai Elantra, and Toyota Corolla all offer ACC as standard or as an optional extra. The Subaru Crosstrek also offers this feature, with the added benefits of a lifted suspension, rugged looks, and roof rails.
Some car manufacturers offer ACC as part of a package or as an add-on for an additional cost. For instance, Kia offers a "Primo Package" which includes its "smart cruise control" feature for around $4,500 on top of the original selling price.
It's worth noting that not all ACC systems work in the same way, and some may react slower than others. Additionally, ACC systems may not function optimally in bad weather conditions as the sensors may be less accurate.
ACC is considered a key component of future generations of intelligent cars, enhancing safety, convenience, and road capacity. When combined with other driver-assist features such as lane-keeping assist, traffic sign recognition, and autonomous emergency braking, ACC can contribute to a basic self-driving system.
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History of adaptive cruise control
The history of adaptive cruise control (ACC) dates back to the early 1900s, when early automobiles featured speed control systems. These early systems used levers to set and maintain a desired speed. In 1908, Peerless introduced a governor to keep the engine speed constant, advertising it as capable of maintaining speed "whether uphill or down".
The modern concept of adaptive cruise control, which automatically adjusts vehicle speed to maintain a safe distance from vehicles ahead, emerged in the 1990s. In 1992, Mitsubishi Motors introduced the first lidar-based distance detection system, called "Debonair", in the Japanese market. This system detected objects that were too close and warned the driver.
In 1995, Mitsubishi introduced an upgraded version called "Preview Distance Control", which used lasers to adjust the vehicle's speed by controlling the throttle or downshifting. However, the driver still needed to apply the brakes.
In 1999, Mercedes-Benz introduced the first radar-assisted adaptive system, called "Distronic", on the S-Class and CL-Class models. This system automatically adjusted the vehicle's speed to maintain a safe distance from the car ahead. In 2005, Mercedes refined the system, introducing "Distronic Plus", which could bring the car to a complete halt if necessary.
Since then, many other automakers have adopted and further developed ACC technology. By 2015, adaptive cruise control was offered in more than 60 vehicles from top US automakers. The systems have continued to evolve, incorporating features such as automatic braking, lane assist, and predictive systems that can anticipate the actions of other vehicles.
Today, ACC is widely recognised as a key component of future generations of intelligent cars, enhancing safety, convenience, and road capacity. It is expected to play a significant role in the transition towards semi-autonomous and autonomous driving.
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Future of adaptive cruise control
The future of adaptive cruise control (ACC) is promising, with the technology expected to play a significant role in the development of semi-autonomous and fully autonomous vehicles. ACC is already regarded as a key component of future generations of intelligent cars, and its market is projected to grow substantially between 2025 and 2035.
One of the primary drivers of this growth is the increasing demand for advanced driver assistance systems (ADAS) and the rising adoption of autonomous driving technology. ACC, as a form of ADAS, enhances safety, comfort, and fuel efficiency, making it an attractive feature for consumers. The integration of machine learning, sensor fusion, and V2X (vehicle-to-everything) communications further enhances the capabilities of ACC systems.
The cost of ACC technology is also becoming more accessible. While a fully-featured ACC system can range from $2,000 to $2,500, more basic systems can be as low-cost as $500. As ACC becomes more prevalent, prices are expected to decrease further.
In terms of functionality, ACC is continuously improving. Predictive systems, for example, can modify vehicle speed based on predictions of other vehicles' behavior, enhancing safety and comfort. Additionally, advancements in radar, LiDAR, and camera-based sensors are improving the accuracy and reliability of ACC, even in adverse weather conditions.
ACC is already widely available in various car models, from small hatchbacks to luxury vehicles, and its presence is expected to become even more common. Leading automakers such as Tesla, Ford, and General Motors have already introduced AI-driven ACC systems, and other manufacturers are likely to follow suit.
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Frequently asked questions
Adaptive cruise control (ACC) is a type of advanced driver-assistance system that automatically adjusts a vehicle's speed to maintain a safe distance from vehicles ahead. It is a more sophisticated version of the traditional cruise control system.
Using information gathered from sensors, cameras, or radar, an adaptive cruise control system monitors the speed and distance of the vehicle in front. It will then either brake or accelerate to maintain a set distance, up to your desired maximum speed.
Adaptive cruise control is now a common feature found in many different car models. Some cars with ACC include the 2025 Subaru Impreza, Honda Civic, Hyundai Elantra, Toyota Corolla, Kia, and Maserati GranCabrio.
ACC systems can cost anywhere between $500 and $2500, depending on the type of ACC and the model of the car.
