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My first impressions are this thing is simply not up to par. It feels like a beta test. I have used it for may 50 total miles, and there were at least 3 encounters that made me say "Holy sh*t"
1st encounter:
I was cruising along at 74 MPH, distance setting at 4. A guy in a big stake-bed truck decided to change lanes about 7-8 car lengths in front of me. Nothing abrupt, he put his signal on and slowly changed lanes. He was probably traveling at 70mph when entering my lane, and was not speeding up so I was slowly approaching him. As he was halfway in my lane, my P85D maintained 74MPH and kept closing in on him, even while he was halfway in my lane. I thought, ok - I will go ahead and let this thing brake for me as I kept my foot hovering above the brake pedal. Sure enough, as he finally completely entered my lane, it waited until literally 2 car lengths to beep the collision warning sound and then abruptly hit the brakes (I have collision warning on the early setting). I still had plenty of time to brake on my own. The problem I see is it doesn't react until the car is completely in your lane, and its not smooth- it creates an erratic driving situation that other drivers might find strange or even cause a problem
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2nd encounter:
Stop and go traffic, car in front of my slowly changes to lane to the right of me, and the car starts accelerating before the car completely changed lanes- getting me a bit close for comfort to the car. Very weird.
I use 2 as my setting otherwise drivers pull into your lane. TACC has worked perfectly.
But that also happens when you are just using your foot and driving "manually". That is not a TACC problem, it's a "other people driving stupidly" problem. There is nothing that an auto driving function can do about other drivers insisting on squeezing into a gap in an unsafe way.That must be nice. I use 1 and people constantly shove themselves into the space... which makes the car slow down... which makes people jump in front of me... ad nauseam
For some reason the URL you posted did not display as a clickable link. Here it is as a link Driverless Car to Begin Cross-Country Trip Sunday - ABC NewsDelphi's doing it
http://abcnews.go.com/Technology/driverless-car-begin-cross-country-trip-sunday/story?id=29807224
I've been driving a Gen III Prius with TACC for the last five years. (I'm currently contemplating upgrading to the MS.) I have a long commute on mixed highway and two-lane roads, always with lots of stop-and-go traffic. I use TACC every opportunity I get. The biggest challenge to effectively using this feature is learning all of it's nuances. For instance, when the car ahead of me pulls over into an exit lane and starts to slow, my Prius will continue to track that car for several seconds, slowing down as well. Not a good thing when cruising on the interstate. So, I have learned in this situation I just need to kick of TACC until clear of that car then I can reengage. I imagine Tesla will have it's own idiosyncrasies and it will just take some time and a lot of practice.
But that also happens when you are just using your foot and driving "manually". That is not a TACC problem, it's a "other people driving stupidly" problem. There is nothing that an auto driving function can do about other drivers insisting on squeezing into a gap in an unsafe way.
In my 45 years of driving experience, a majority of drivers lack the concept of a safe following distance. They don't understand the concepts of reaction time and braking distance. <snip>
Until then, people will continue to cut into a 20 foot gap while traveling at 70mph and think that is a safe thing to do. I see it happen multiple times every day I am on the road.