If driver was pressing the brake but not enough to stop the car, city safety will not engage. This is my understanding.

Sent from my N9130 using Tapatalk

 

Nonsense. We experience of pressing the brake but the city safe activated full brake because its think we going to crash on to the back of a golf who brake too suddenly. It's all down to the user setting. You never know some idiot switch the City safe off or in "late" setting. We set it to the "early" which quite sensitive.

 

Too many variables to know. If the Volvo driver changed lanes quickly and then the bus braked, there is no way city safety is going to save you. It is a tech assistant, not a miracle maker.

 

Just came across a couple of photos depicting an accident involving an XC90 in Hong Kong. There is no detail about it from the facebook post but it got me thinking. Shouldn't the City Safety feature prevent this from happening?

First, the question cannot be answered without details of the incident to compare against City Safety's specific operating paramaters. Second, City Safety will not prevent all collisions.

If driver was pressing the brake but not enough to stop the car, city safety will not engage. This is my understanding.

Sent from my N9130 using Tapatalk

That is not correct. On the contrary, City Safety will apply up to full braking if the driver isn't pressing the brake hard enough.

 

I can confirm what Calhoun said that City Safety will brake harder if the driver is not doing enough to mitigate. I had that experience the a MY16 XC60 as I was about to merge onto I-35 from I-494. The traffic came to an abrupt halt. I thought I was braking hard enough but City Safety activated and braked enough to avoid low speed impact. We were probably going 10 Mph and before it took over.

 

Good, another case is when driver is steering, not sure how city safety works.

Sent from my M470BSA using Tapatalk

 

In that traffic people often go too fast and too close. That's how driving is in the culture. So if the bus suddenly brake, no amount of force can prevent it. Such is physics.

 

City Safety is not capable enough. In a future autonomous car, it should be able to check the distance and override driver's hard press on gas pedal, don't do unsafe acceleration.

 

Have you driven on those traffic condition? If it’s that restrictive I bet drivers would just turn them off. Safe distance means that you’ll always get cut off

 

A friend of mine managed to rear end a truck on the highway with his XC60 in slow traffic. The city safety had braked the car to a stand still and when the traffic started to roll again my friend pushed the accelerator, something happened and he ended up in the rear of the truck.

 

Does anybody know what "Earlier", "Normal" and "Later" really mean? The manual (on the phone) doesn't say anything relating to measurements, it just talks about fewer or more warnings. I'm just curious, that's all.

Is it, for example, Normal means x ft (or seconds) before it kicks in warning of impending doom...Earlier means approximately x+y ft...Later means x-z ft.
Or maybe something else like, for example, Earlier gives double the amount of warnings that Normal would give and Later would be half the amount of warnings.
???

I know there is a lot of calculation that the car is doing all the time, so that might be impossible to state in a manual, for fear of lawsuits. But it was just a curiosity question.

 

It is not about the amount of warnings but the relative sensitivity of the system vs distance x speed of your vehicle vs whatever is ahead of you (whether it is still, crawling or moving at a given speed).

 

Correct. It will depend upon the area in which you drive. For example, here in Christchurch there is still a significant amount of post-quake roadworks around, and sometimes there are tiny wiggly lanes marked with cones. Occasionally you can end up in a situation where you are barrelling towards another vehicle but the cones redirect both of you into narrow lanes around whatever obstacle there is. I've had City Safety sometimes flash up a warning when this relative positioning happens, but setting it later means that I don't get the paranoid auto-braking and thus no risk of someone rear-ending me.

 

Too many variables could be at play. Perhaps, the driver deactivated some of these controls and learned the hard way afterwards. I was also told that the system will not activate at speeds exceeding a certain limit. I just don't remember what that limit was, but was told that it will not work at higher speeds.

 

Very hard to figure out indeed. It seems like only the bumper got affected. The hood doesn't look to have any dents/creases in it which is strange, b/c if it did hit the bus in front of it, that bus' back bumper is very shallow which means the hood should have also hit the back of the bus too.

It actually looks like the front bumper got ripped forward off the car based on where the crack is in the lower fascia and where the grill buckled to the left of the Volvo grill emblem...kind of like the bus trying to squeeze by on the left hand side and managed to pull off the R-Designs bumper along the way.

City Safety would not have seen that coming since that was an accident coming from behind/beside.

 

I think you're right, it does seem like the bumper got ripped forward off the car. I guess the humongous side mirror can't help you if you don't check it.

Sent from my iPhone using Tapatalk