Driver Info Screen Problem
- Thread starter FBOL
- Start date
Radar system
Not quite sure but I think that indicates that radar cruise is on but not set to a specific speed.
Does your car have a HUD?
1
181962
Radar cruise does not have a fixed trailing distance, at least not in my 2020. There is a toggle switch on the steering wheel to adjust radar cruise trailing distance from near to far with a couple other settings in between.
It's not clear what the pictures in the above posts are actually illustrating, but if I start my vehicle, turn on radar cruise and adjust the trailing distance with the toggle switch, I get a display similar to what has been posted. The horizontal lines are not car lengths; they mark the various near-to-far trailing distance settings with the display changing in kind as I toggle, like the attached video if it is viewable to you.
I have no idea what trailing distance I would get with the near setting. If it happens to be three car lengths that's definitely not safe at highway speeds. If you were to expect the radar cruise to stop in time if the guy in front slammed on his brakes you might be in for a rude surprise. It flashes a warning first then applies the brakes which at that speed will likely be too late.
A tight trailing distance might not be avoidable in high speed in rush hour traffic. I'm reminded of my past life driving Chicago area tollways in rush hour. But I would not compound the risk by using cruise control, radar or otherwise.
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Near has to have some preset distance as well as far.
Otherwise how would the system operate. When I use RC it always maintains a specific distance from the vehicle in front unless the vehicle in front accelerates at a high rate then RC will increase speed until it hits the set speed that the RC is set to.
I have a 2020 CX-5 Signature and somehow this is new information to me. Please elaborate so I can learn the location of this switch ...
It's one of the buttons associated with cruise control.
1
181962
It's immediately to the left of the set+/resume/set- cruise switch. Some useful information can be found beginning at page 4-147 in the 2020 manual. The switches are pictured on page 4-152.
1
181962
I was responding to the blanket statement that radar cruise will slow the vehicle at three car lengths. My point was that there is variability with the near-to-far settings.
Now, does a particular setting have a fixed distance or does it vary by your vehicle speed? I don't know. I have not used radar cruise past some preliminary testing. What I do know is that "near" in the real world at 25 mphs is a lot closer than "near" at 75 mphs with a much longer braking distance. Variability within a particular setting is certainly conceivable but whether that's the case in fact I'll leave to others to figure out.
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- 2020 CX-5 GT AWD
- :
- 2020 CX-5 GT AWD
How to set the distance-between-vehicles during headway control
The distance-between-vehicles is set to a shorter distance by pressing the
And here is the link online where you can go and read more:
2020 CX-5 Owner's Manual
1
181962
"At 50 mph" in the upper left box indicates the distance-between-vehicles is variable within each setting based on vehicle speed.How to set the distance-between-vehicles during headway control
The distance-between-vehicles is set to a shorter distance by pressing theswitch. The distance-between-vehicles is set to a longer distance by pressing theswitch. The distance-between-vehicles can be set to 4 levels; Long, medium, short, and extremely short distance.
View attachment 313733
And here is the link online where you can go and read more:
2020 CX-5 Owner's Manual
I wonder if it has to do with time rather than actual distance. The old 2 second rule, or whatever it is.
At 50mph, it's X distance. At 70mph is X+Y distance to equal roughly same time space to vehicle in front.
Just a thought.
I think you're right. There's some algorithm there. It just needs a little fine tuning. The system seems to wait a little too long to start braking especially when there's car stopped ahead at a red light.
Here's the Mazda distances for Adaptive CC.
- Long (four distance bars): about 164 ft.
- Medium (three distance bars): about 131 ft.
- Short (two distance bars): about 98 ft.
- Extremely Short (one distance bar): about 82 ft.
1
181962
See posts #15 and #16 above. Those distances are for 50 mph so evidently these distances are variable by speed which makes perfect sense while not being hard to accomplish. a simple algorithm to construct. Whether the algorithm is optimally constructed for real world circumstances is not something I'm in a position to opine upon since I don't use radar cruise.
Radar cruise with stop-and-go operates at speeds down to 0 mph but only as low as 20 mph under certain conditions including a dirty windshield (or one presumes ice or snow) obscuring the camera. You could run the thing in slow moving stop and go traffic and there have been reports here of people doing just that though I personally wouldn't try it. It's pretty obvious you'd want speed-based adjustments for 20 mphs vs. the max speed radar cruise will operate, 90 mph.
Keep in mind if you're slogging along under 20 mph radar cruise and its stop-and-go may deactivate. If you don't take notice of that fact, however, Advanced Smart City Brake Support which operates down to 2 mph will presumably save you. Or is it one of the other two brake support systems--that's more digging than I'd prefer at the moment.
Those specs are according to the 2020 manual. The specs might or might not vary with other model years, I couldn't say.
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