… put another way, it maintains a preset distance between yourself and the vehicle in front of you. With regular cruise control, you set it a certain speed and that speed will be maintained but anytime a car in front you slows down you have to decelerate to keep your "space cushion" or the opposite if traffic speeds up. With adaptive cruise (another name for "radar cruise control"), you set your distance and the "radar" keeps you at that distance from the vehicle in front of you by speeding up or slowing down your rig automatically. Hope this is a decent explanation for anyone who doesn't already know what it is. This "radar" also doubles in function to prevent forward collisions by warning you abruptly and/or automatically applying the brakes if traffic suddenly decelerates/stops in front of you to keep you from "rear ending" something.
We have this on my wife's car and I'll tell you it is super nice on long freeway trips. But on her car it is nicely designed into the aesthetic of the grill (looks more like a small mortar shell or something poking out slightly), whereas on the 2020 4runner, looks like someone found a large aftermarket rectangle radar dish and slapped it smack in the middle of the otherwise beautiful TRD Pro heritage grille. Many have said it already in this thread but not very well integrated visually to the rig. As for blind spot monitoring, that is on my wife's car too and involves many little sensors being put laterally along the vehicle to know if you are about to move sideways (or backwards) into an obstruction like a vehicle in your blind spot or a pedestrian behind you. This feature usually appears with warning in the instrument cluster and more helpfully as a warning beacon light in the sideview mirror telling you not to change lanes because something is in your way. This also can sort of keep you from drifting out of a lane by assisting with steering but that feature is just annoying and doesn't work very well whereas the blind sopot monitoring can actually be helpful (again best part is the little beacon lights in the side mirrors). Unless they loaded the 2020 runner with these lateral sensors I doubt its on there.... also the mirrors look no different than previous years so I doubt that mirror beacon is added otherwise WHY DIDN'T THEY PUT MIRROR BLINKERS AND PUDDLE LIGHTS ON IT FOR CRYING OUT LOUD?
Cheers - JC