I have had this happen as well. Not only for overpasses, but for close guardrails as well. Nothing is foolproof.
I have had this happen as well. Not only for overpasses, but for close guardrails as well. Nothing is foolproof.Have had the Break Alert message and audible beeping occur when I drive under a bridge on my way to work when it is sunny out. I suspect this is due to the radar thinking the shadow of the bridge is an object in the road. Not a big issue but something I find interesting in that it is probably a limitation of the "artificial intelligence" baked into the programming of the radar safety features. You can view it happening on this Youtube video I uploaded:
https://www.youtube.com/watch?v=r0z4Tou4U5k&feature=youtu.be
CMBS can be turned off, but turns back on with each drive. There are some Honda Sensing features (like RDM, ACC) that can be turned off and stay off, but CMBS is not one.Can you turn off the auto-braking and keep it off?
It happened at 9 o'clock at night. No sun/shadows to speak of. I did dial back the sensitivity from normal to short today to see if it helps in the future.Scary... Hopefully no one was following too close behind you!
Do you pass this sign at different times of day? Have you noticed the incidents happen when the shadows are a particular size/direction? Wondering if the sudden response was triggered by a "bigger than usual" shadow...? Or any unusual obstructions or issues noticed on your camera area or bumper-mounted radar?
Does the brake lights come on if CMBS activates the brakes?It happened at 9 o'clock at night. No sun/shadows to speak of. I did dial back the sensitivity from normal to short today to see if it helps in the future.
Question - does the CBMS use radar, camera or both to determine if an obstacle exists?
In reviewing the attachment you posted, I indeed needed to immediately "deeply press" the accelerator to keep speed up so the guy behind me didn't run into me.
Yes - when since the braking is triggered by Honda Sensing for full physical stop, the rear brake lights come on to alert drivers who are behind. This is different from regen (engine) braking, which is meant for slowing rather than full stop.Does the brake lights come on if CMBS activates the brakes?
That's good to hear so it should help mitigate a crash from occurring even with a false alert unless the driver behind is tailgating.Yes - when since the braking is triggered by Honda Sensing for full physical stop, the rear brake lights come on to alert drivers who are behind. This is different from regen (engine) braking, which is meant for slowing rather than full stop.
(I read this in a Pilot forum, where a Honda Engineer called a forum member back advising that when any Sensing feature applies the brake, the rear lights work as if YOU put your foot to the brake pedal. Our Insight manual only calls out that the rear brake lights illuminate for ACC/LSF - pg 492.)
CMBS uses both the radar and camera.Question - does the CBMS use radar, camera or both to determine if an obstacle exists?
2 days after I wrote that, I received my first CMBS false alert where the brakes did engage(I was going probably 50mph and it felt like a max setting regenerative braking to me). Just got the chance to pull the footage off my dashcam. I think it might be the shadow from the bridge column.I have my CMBS set to short. I have experienced false alerts(2 times) but the car has never actually activate the brakes by itself.
That, or the pothole on the left.2 days after I wrote that, I received my first CMBS false alert where the brakes did engage(I was going probably 50mph and it felt like a max setting regenerative braking to me). Just got the chance to pull the footage off my dashcam. I think it might be the shadow from the bridge column.
https://drive.google.com/file/d/1JRH1bdkw2RtjFgZXHvBWcigpjPLIU4cB/view?usp=sharing
I think I found you a solution for turning the CMBS off permanently. Just need to get something to cover the radar sensor. :wink:I have experienced CMBS working the way it probably should have when someone was taking their time making a right turn. It was an unwelcome surprise. Afterwards I turned down the sensitivity, but have since experienced a dip in the road that pumped the brakes momentarily. I really wish it would turn off and stay off. I'm not so sure that a failure of this system is less likely than an actual event in which CBMS would prevent an accident.
I could actually do without any of the Honda Sensing features. None of them work great. ACC is just OK. LKAS just enables you to screw off and fights you when you are paying attention. They are all susceptible to less than ideal road and weather conditions. Thanks Honda, for burying the radar unit inside a pocket at the bottom of the bumper where it immediately is covered with snow and ice.
I have a couple questions, hoping to learn from your experience. (I'm using default settings and haven't had CMBS brake for me; I've only seen the brake warning when I was in process of applying brake anyhow):2 days after I wrote that, I received my first CMBS false alert where the brakes did engage(I was going probably 50mph and it felt like a max setting regenerative braking to me). Just got the chance to pull the footage off my dashcam. I think it might be the shadow from the bridge column.
I'm not entirely sure how I feel yet. I have experienced more than my share of CMBS warnings on teh DII, but only once have the brakes actuated without my command, and there really was a car there. Wouldn't the Honda engineers have preferred false positives to missed positives (can't think of the right term)?I have experienced CMBS working the way it probably should have when someone was taking their time making a right turn. It was an unwelcome surprise. Afterwards I turned down the sensitivity, but have since experienced a dip in the road that pumped the brakes momentarily. I really wish it would turn off and stay off. I'm not so sure that a failure of this system is less likely than an actual event in which CBMS would prevent an accident.
I wish ACC were far less aggressive about matching the speed of the car in front of me. It would be more fuel efficient to very, very incrementally approach the car I'm trailing instead of to try to get there quickly.ACC is just OK.