5 ms·

I imagine this is actually a pretty tough problem to solve.... road marking change dramatically within a few feet sometimes.... most of the residential streets

I imagine this is actually a pretty tough problem to solve.... road marking change dramatically within a few feet sometimes.... most of the residential streets in the historic area I live in have no markings at all but its also an area where markings, composition of road materials etc are subject to change QUICKLY from street to street.

brigade 4y ago
In addition to LiDAR, Tesla also bucks self-driving wisdom by refusing to use mapping data. Everyone else’s L3/L4 plans include a reference mapping of what they expect to see, with the car signaling a disengagement if it deviates too far from the reference.
tablespoon 4y ago
>> I imagine this is actually a pretty tough problem to solve.... road marking change dramatically within a few feet sometimes.... most of the residential streets in the historic area I live in have no markings at all but its also an area where markings, composition of road materials etc are subject to change QUICKLY from street to street. > I imagine this is actually a pretty tough problem to solve.... road marking change dramatically within a few feet sometimes.... most of the residential streets in the historic area I live in have no markings at all but its also an area where markings, composition of road materials etc are subject to change QUICKLY from street to street. I wonder if they could do something like a "Kalman filter" to address this. If you're driving forward on a road, the driving program shouldn't re-derive the scene from moment to moment, but it should update its existing picture with new data. If all the sudden its long-range sensors get jammed, it should be able use its last picture + dead reckoning for at least a little bit (though only for trying to stop in safe(r) position or avoiding entering a more dangerous area). It certainly shouldn't move into oncoming traffic, like this Tesla did. That's exactly what I would do as a human driver (say if all the sudden I'm in a white-out). I know where I am on the road and where the nearby cars were, so I have maybe 10 seconds to try to move off to the side and stop, even if I'm blinded.
cameldrv 4y ago
Yeah but they don't change within a few seconds. You constantly see the lane lines wiggling on these displays and that suggests to me that they have a problem with integrating information over time about objects.

brigade 4y ago

In addition to LiDAR, Tesla also bucks self-driving wisdom by refusing to use mapping data. Everyone else’s L3/L4 plans include a reference mapping of what they expect to see, with the car signaling a disengagement if it deviates too far from the reference.

tablespoon 4y ago

>> I imagine this is actually a pretty tough problem to solve.... road marking change dramatically within a few feet sometimes.... most of the residential streets in the historic area I live in have no markings at all but its also an area where markings, composition of road materials etc are subject to change QUICKLY from street to street. > I imagine this is actually a pretty tough problem to solve.... road marking change dramatically within a few feet sometimes.... most of the residential streets in the historic area I live in have no markings at all but its also an area where markings, composition of road materials etc are subject to change QUICKLY from street to street. I wonder if they could do something like a "Kalman filter" to address this. If you're driving forward on a road, the driving program shouldn't re-derive the scene from moment to moment, but it should update its existing picture with new data. If all the sudden its long-range sensors get jammed, it should be able use its last picture + dead reckoning for at least a little bit (though only for trying to stop in safe(r) position or avoiding entering a more dangerous area). It certainly shouldn't move into oncoming traffic, like this Tesla did. That's exactly what I would do as a human driver (say if all the sudden I'm in a white-out). I know where I am on the road and where the nearby cars were, so I have maybe 10 seconds to try to move off to the side and stop, even if I'm blinded.

cameldrv 4y ago

Yeah but they don't change within a few seconds. You constantly see the lane lines wiggling on these displays and that suggests to me that they have a problem with integrating information over time about objects.