Several reviews are now available from the ProPilot Assist Preview event.
The best one I've read is linked below:
https://www.forbes.com/sites/samabuelsa ... 702d6c568b
Nissan ProPilot Assist Preview - It's Automated But Not Self-Driving
...While we won’t get to see the new Leaf sans camouflage until September 5, Nissan did invite a group of media to its Farmington Hills, Mich. engineering center to sample some Rogues equipped with the ProPilot Assist system. Nissan calls this a level 2 (L2) automation system because it is capable of doing coordinated longitudinal and lateral control. That means it can handle acceleration, braking and steering. What it doesn’t do is let the driver climb into the back seat to take a nap, or relax and watch a movie.
...the Nissan system explicitly requires drivers to keep at least one hand on the wheel at all times. A torque sensor in the steering wheel looks for small motions indicative of a driver holding the wheel or resistance to automatic steering motions. If the system decides that the driver doesn’t have a reasonably firm grip on the wheel after five to ten seconds it gives an audible warning and flashes an alert in the instrument cluster. Five seconds later, the alerts get progressively more insistent.
Ten seconds after that, it will automatically pulse the brakes a couple of times trying to get your attention. After 25 to 30 seconds with no sign the driver is responding, ProPilot will start slowing the vehicle and when speed drops below 40 mph, the hazard lights are turned on. Without intervention from the driver, the car will come to a complete stop in its lane...
If you try to nudge the car over to one side or the either without a turn signal on, you’ll feel the system trying to steer back to the center of the lane. Like other lane keeping systems, it’s relatively easy to overpower since it is designed as an assist, not to take over from the human driver. The forward facing radar tracks the vehicle ahead and maintains a consistent gap up to whatever speed you set. The graphics in the instrument cluster show when a vehicle is detected within range and the lane markers go from grey to green when markings are detected consistently on both sides of the car.
From a functional standpoint, the system seemed to work very well within the constraints of what it is designed to do. When lanes were detected, ProPilot did a very good job of keeping the Rogue tracking the center without bouncing back and forth. The stretch of I-696 north of Detroit that we tested on features of a number of curves of varying radius as well as overpasses that saw us go from bright sunshine to dark shadow...
Based on our early preview, ProPilot Assist is a good step in the direction of making driving in traffic or long trips easier and safer. As Carlos Ghosn promised earlier this year, it will get better every year until it reaches at least L4. But it’s not self-driving yet and Nissan wants customers to understand that before they try to do anything foolish.
ProPilot is not on my must-have
list at this point, but it probably would be if I drove most of my miles on freeways, and especially so if much of that freeway time was spent in heavy traffic.