Thanks Dazzler. I read your post about the blind spot monitoring problem, and the reloading of software is something I might bring up with them depending on the response I get.
I’ve never owned or driven a car with forward collision warning/alert system, so this is all new to me, but what you describe of how FCA worked on you Calais is how I imagine it is supposed to work with the initial collision warning set to EARLY at least.
Have seen the 3rd warning, and definitely didn't plan on seeing it... And yes, car braked as well. Main issue for me is LKAS - doesn't seem to pick up the lane markings around the city.
I have same model and have issues with smart cruise control not always working, and no warnings whatsoever with FCW. I have very nearly crashed at 100 kms into the car in front that has either slowed to a crawl on freeway or simply stopped, On initial 1500 km check the useless dealer stated no faults, and I need to read to manual.
The driverless car will solve all these problems. Cant Wait!!
I have same model and have issues with smart cruise control not always working, and no warnings whatsoever with FCW. I have very nearly crashed at 100 km/h into the car in front that has either slowed to a crawl on freeway or simply stopped, On initial 1500 km check the useless dealer stated no faults, and I need to read to manual.
I think I said in earlier posts I would like to see constant visual dash system to let u know Safety systems are all working correctly like showing a brake symbol to indicate system is applying the brakes and you not left pondering is it going to slow down or stop before impact. If it is not functioning correctly, just disengage cruise completely so at least u know something is dodgy
It does add an element of excitement to morning commute, but one I could do without To be honest, the smell of fear from my undies, doesn't smell too good with the leather.
The Radar is designed to only detect MOVING vehicles, since everything that is stationary is normally "ground clutter" and so gets filtered by the radar electronics, so that the decision processor only has to consider moving objects.
What SCC cannot do therefore, is see a slow or stopped car on the freeway if you are NOT actively following it.
So the sudden appearance of a stopped car, at 100KM/h, and then somehow breaking is not what SCC is designed for.
Although AEB might apply the brakes and reduce the impact speed, it also can't prevent the crash.
This situation is one of the documented weaknesses of this driver assistance technology.
A particularly nasty variation of this "weakness" occurs when you're following a lead car on a multi lane carriageway using SCC, and the lead car suddenly changes into another lane because there is a stopped car in the original lane. Your car won't detect the stationary vehicle now suddenly ahead of you (because it's stationary and radar works best detecting moving vehicles) so will happily just crash into it. If the driver doesn't react, the AEB might reduce the impact by a few % and the seatbelts and airbags will do the rest to save the lives of your vehicle's occupants.
That would make sense as I usually have SCC minimum 1 bar gap set to reduce gap to the car in front as on Perth freeways there will suddenly be 3 or 4 cars pulled into the aforementioned 4 bar gap, and with constant braking makes you feel like you are going backwards. So when a car in front slows or stops after I have matched it's speed for a few kms, the radar is losing track of it, and or not seeing it altogether. :sweating:Are you saying that when your SCC is following the car in front with the 1 second gap, and the front car slows down, yours doesn't?
constant braking
Many thanks for the info, I know i shouldn't trust SCC like I have been, but you want to try out the new toys.
More warnings on the dash display for SCC would also benefit everyone, more sophisticated radar & laser system, filtering ground clutter
I will probably just set Smart CC to Normal cruise control, set the speed and if car in front slows, you brake too and cruise control disengages. its just bit too dangerous for me in its current state of development. :rolleyes:
The Radar is designed to only detect MOVING vehicles, since everything that is stationary is normally "ground clutter" and so gets filtered by the radar electronics, so that the decision processor only has to consider moving objects.
What SCC cannot do therefore, is see a slow or stopped car on the freeway if you are NOT actively following it.
So the sudden appearance of a stopped car, at 100KM/h, and then somehow breaking is not what SCC is designed for.
Although AEB might apply the brakes and reduce the impact speed, it also can't prevent the crash.
This situation is one of the documented weaknesses of this driver assistance technology.
A particularly nasty variation of this "weakness" occurs when you're following a lead car on a multi lane carriageway using SCC, and the lead car suddenly changes into another lane because there is a stopped car in the original lane. Your car won't detect the stationary vehicle now suddenly ahead of you (because it's stationary and radar works best detecting moving vehicles) so will happily just crash into it. If the driver doesn't react, the AEB might reduce the impact by a few % and the seatbelts and airbags will do the rest to save the lives of your vehicle's occupants.
That would make sense as I usually have SCC minimum 1 bar gap set to reduce gap to the car in front as on Perth freeways there will suddenly be 3 or 4 cars pulled into the aforementioned 4 bar gap, and with constant braking makes you feel like you are going backwards. So when a car in front slows or stops after I have matched it's speed for a few kms, the radar is losing track of it, and or not seeing it altogether. :sweating:
Quote from: Crustycottage on October 24, 2017, 00:42:51
That would make sense as I usually have SCC minimum 1 bar gap set to reduce gap to the car in front as on Perth freeways there will suddenly be 3 or 4 cars pulled into the aforementioned 4 bar gap, and with constant braking makes you feel like you are going backwards. So when a car in front slows or stops after I have matched it's speed for a few kms, the radar is losing track of it, and or not seeing it altogether.
Are you saying that when your SCC is following the car in front with the 1 second gap, and the front car slows down, yours doesn't?
Please try the 2.1 second gap for a bit and see if this increased distance enables your car to stop correctly.
Yes if I lose the car in front eg Im sat 100kmh they speed off into the distance over 100-150m gap opens up between me and them, then they slow down again to 5-10kmh or stop as they hit traffic congestion SCC radar does not see them or indicate a car symbol on dash SCC. Also as you pointed out in earlier reply if the car swap lanes and there is a stopped or slowing car, SCC does not seem them. These conditions are typical for Perth drivers on freeways with people swapping lanes to make time, sat in fast lane at 80kmh. The Perth 2 second gap rule means space for 3 extra cars. i will try 2 second gap to see if it extends the radar sensing range
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constant braking
We definitely need some kind of indication light for this, so we know whether our car is applying the breaks...
totally agree i have noticed too that following drivers in my rear view mirror are surprised & getting angry as SCC maintains my set speed e.g 80kmh with braking for no apparent reason, and that i am brake testing them. This is not me hogging the fast lane but on exit ramps etc
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Many thanks for the info, I know i shouldn't trust SCC like I have been, but you want to try out the new toys.
More warnings on the dash display for SCC would also benefit everyone, more sophisticated radar & laser system, filtering ground clutter
I will probably just set Smart CC to Normal cruise control, set the speed and if car in front slows, you brake too and cruise control disengages. its just bit too dangerous for me in its current state of development.
Please let me know if you're able to switch from SCC to normal CC as per the manual.
It says if you hold the distance-bar-adjuster button for 4 seconds it toggles between SCC and normal CC, but I've tried this and it doesn't switch, SCC-only seems to be how my car wants to roll.
If I read correctly one bar gap = 1 second gap, you really need to follow a vehicle with a 2 second gap to allow for reaction time.
I wonder if all this Wiz bang technology has the same effect that ABS had all those years ago. There was a study where drivers were told they had ABS in a vehicle and drivers were given a vehicle with ABS and not told. Despite the different system of braking required to effectively use ABS can you guess which vehicles had less accidents......That's right the vehicles that were fitted with ABS and the drivers not told. Seems that the drivers that were told they had ABS cars drove more aggressively and relied too much on the technology.....
If I read correctly one bar gap = 1 second gap, you really need to follow a vehicle with a 2 second gap to allow for reaction time.
If I read correctly one bar gap = 1 second gap, you really need to follow a vehicle with a 2 second gap to allow for reaction time.
I wonder if all this Wiz bang technology has the same effect that ABS had all those years ago. There was a study where drivers were told they had ABS in a vehicle and drivers were given a vehicle with ABS and not told. Despite the different system of braking required to effectively use ABS can you guess which vehicles had less accidents......That's right the vehicles that were fitted with ABS and the drivers not told. Seems that the drivers that were told they had ABS cars drove more aggressively and relied too much on the technology.....
Here the FCW is an aid to the driver, a last line of defence against you being distracted by that hot blonde when you should be watching the road in front.
The point of the gap is to also allow you to allow for the driver behind if I have someone who is too close, my distance gets bigger, because I now have to allow distance to brake for them too. A computer can't do this at this point.
yes it works as manual but you have to be stationary, i was sat on driveway,
I certainly prefer driving (especially on country freeways) with the 2.1 second gap, since at that distance you have so much time you can end your phone call, turn off the music, and even avoid becoming part of the pile-up you see still 80 meters ahead... :neutral:
I certainly prefer driving (especially on country freeways) with the 2.1 second gap, since at that distance you have so much time you can end your phone call, turn off the music, and even avoid becoming part of the pile-up you see still 80 meters ahead... :neutral:
:confused: Correct me if I'm wrong, but presumably you are exceeding 80k, therefore you only have a warning signal, hence human reaction time becomes a major factor. At 90kph you need 130 meters of clear sight (approaching an intersection) on flat dry road and 83 meters to stop in the dry.
I had one today (a situation that is) :Sorry to hear that :cool: :evil:
Using the Brakes :Shocked: CHICKEN!
:D I'm just wondering how complacent people will get with their new safety devices.
As you may know, I rarely use CC, certainly never in traffic and even on country roads I don't bother to use it, there are usually so many slower vehicles etc that I find I'm constantly hitting 'resume'.