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Systems with multiple sensors can practice sensor fusion to integrate the data to improve safety and/or driving experience. GPS data can inform the system of geographic features such as a freeway offramp. A camera system could notice driver behavior such as brake lights and/or a turn signal. Luxury automakers such as Tesla and Audi are implementing the newest rendition of cruise control on their latest vehicle models – Semi-autonomous Cruise Control.
Honda Adaptive Cruise Control (ACC) with Low-Speed Follow
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It connects to the throttle control seen in the previous section, as well as several sensors. The diagram below shows the inputs and outputs of a typical cruise control system. ACC works well in clear day and night driving, and in light weather. Additionally, if dirt, snow, or ice are on the sensors, they won’t work.
This week’s wheels
Cruise control has come a long way from its early days in its quest to assist drivers on the road. When first introduced, it was only found in luxury car models due to its high production cost. As less expensive sensors reached the market, adaptive cruise control is steadily becoming a standard feature in new vehicles today. There continues to be plenty of confusion about self-driving or autonomous systems, what they are, and how they operate. However, the major difference between adaptive cruise control and a self-driving system is, ACC is simply a component of a driverless system.
Know the trims. Learn the features.
Once the traffic starts moving again or if there is no longer a car in the lane ahead, ACC will accelerate to resume the previous set speed. Although ACC systems may take some getting used to, our survey respondents told us they appreciated the stress relief the feature brings. Active Driving Assistance systems rely on several of a car’s high-tech features working together. All cruise control systems must have the capability to be turned off explicitly and automatically when the driver depresses the brake pedal and often also the clutch. Cruise control systems frequently include a memory feature to resume the set speed after braking and a coast feature to reduce the set speed without braking. When the cruise control is engaged, the throttle can still accelerate the car, but once the pedal is released, it will slow down the vehicle until it reaches the previously set speed.
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To help you recognize ACC features, here are four automaker examples. By contrast, Nissan/Infiniti’s confusing and poorly labeled symbols on the steering wheel make ProPILOT Assist and the updated ProPILOT Assist 2.0 unintuitive to use and hurt its “ease of use” score. CR expands the tract at its Auto Test Center to help evaluate advanced auto technology. Around the world today, over one million SAE Level 1 and Level 2 automated vehicles use the TomTom ADAS Map – both private and commercial. Having doubled in less than one year, this number is bound to rise in the future. Close this window to stay here or choose another country to see vehicles and services specific to your location.
About Adaptive Cruise Control
The question is whether drivers want to cede that kind of control. Exponent Energy, the Indian battery-tech company that claims to have developed 15-minute charging technology, has partnered with auto manufacturer Omega Seiki Mobility to deliver a passenger three-wheel EV with those rapid-charging capabilities. Exoes, a French-based startup that developed battery cooling technology for EVs, raised €35 million ($37.5 million) from BpiFrance and Meridiam Green Impact Growth Fund. The High-Speed Range refers to this function being operational at speeds of around 40 to 180km. When the speed drops below 40km, a visual alert and an audio prompt warn that TSS-P has been disabled. Names, tech, and bundled features make the automotive landscape — dotted with endless features, diverse names, and function variations — a bit tricky to navigate.
This provides the convenience of a stop-and-go feature in most traffic jam situations, without the hassle of having to re-engage ACC once traffic ahead starts moving forward again. The camera is there as a safeguard to ensure that drivers are watching the roadway. Most of the other systems change the ACC mode to standby after the vehicle has been stopped for just a few seconds, which eliminates the benefits of using ACC in stop-and-go traffic.
Downsides of Automatic Cruise Control
As the car approached slower traffic, an arrow appeared on the instrument cluster (see photo), the system turned my indicator on and then made the lane change. This can be overridden by holding the steering wheel and keeping it in the lane. ACC uses a combination of radar, cameras, and various other sensors to monitor the distance to the vehicle ahead and its relative speed. This data is processed by the car’s computer systems to adjust the throttle and apply brakes if necessary, ensuring a safe following distance. BMW’s Driving Assistance Professional and GM’s Super Cruise have a driver monitoring camera that ensures the operator is looking at the road ahead when the ACC system brings the vehicle to a full stop, for up to 30 seconds.
Adaptive cruise control
You’ll see a message in your cluster display that you have switched between cruise control and Adaptive Cruise Control. Then, check which cruise control icon is displayed before you set the cruise control speed and start using the system. To choose a cruise speed, press the Set button while driving at the desired speed.
This helps drivers understand what the system is “seeing,” and thus why the system is behaving the way it is. When there’s a seamless collaboration between the lane centering assistance system and the driver’s own steering inputs, it encourages the driver to stay alert and in control. CR safety experts say that this type of DDMS is key to the safety of any ADA system—and, in fact, CR awards extra points to the Overall Score of tested models whose ADA systems are adequately equipped. Starting with 2024 model-year vehicles, we will deduct points if an ADA system doesn’t have adequate DDMS. Right now, only Ford and GM’s systems meet our criteria for earning additional points, but others could be available soon. To turn the feature on, press the cruise control On/Off button on the steering wheel.
When operating on pre-mapped highways that allow for hands-free operation, BlueCruise prompts the driver in advance of risky scenarios, such as lane merges or curves, to place their hands back on the wheel. This feature encourages drivers to be ready to steer if needed and doesn’t turn the LCA system off when they do. The ACC function of Tesla’s Autopilot system is capable of stopping the car, such as at a red light behind another vehicle, for an unlimited amount of time before resuming again. But without an adequate driver monitoring camera, this is potentially unsafe as there’s no way to know whether the driver is still paying attention when the vehicle starts moving again.
The cruise control system actually has a lot of functions other than controlling the speed of your car. For instance, the cruise control pictured below can accelerate or decelerate the car by 1 mph with the tap of a button. There are also several important safety features -- the cruise control will disengage as soon as you hit the brake pedal, and it won't engage at speeds less than 25 mph (40 kph). When a system is controlling a car’s speed and steering, there’s a risk that its driver might feel more free to pick up a cell phone, eat a messy burger, or engage in other reckless, distracting behavior.
Next, ACC requires drivers to set their preferred following distance from the vehicle’s pre-set options. The latest ADA systems are safest to use either on long highway drives or when you’re stuck in a traffic jam—situations in which they can best reduce driver fatigue and stress. On the other hand, using these systems on narrow, curvy roads or around pedestrians can be dangerous and stressful for drivers. Bad weather that affects road surface traction or visibility may impact its performance.
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