Road Sign Assist?
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The RSA setting is in the Toyota Safety Sense menu ( gear icon, 2nd from bottom on Multi Information Display), keep scrolling to the right and it should be on the second screen.
This feature will read the speed limit signs and display it on the MID and HUD screens
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If you compare the TSS section of the Highlander specs pages on toyota.com (US) vs toyota.ca (CAN) you will notice there is only one omission in Canada: road sign assist.
If you Google toyota "road sign assist" canada you will find people discussing this with regards to other models. It would seem it doesn't work in Canada, but may actually work if you take your vehicle into the US possibly(?) which makes me think it's all down to whether it can recognize the prevalent road sign designs in each country or not. But either way, it is not in the specs in Canada so I would not expect it to work for you, BLBL.
USA:
![290920]()
Canada:
![290921]()
If you Google toyota "road sign assist" canada you will find people discussing this with regards to other models. It would seem it doesn't work in Canada, but may actually work if you take your vehicle into the US possibly(?) which makes me think it's all down to whether it can recognize the prevalent road sign designs in each country or not. But either way, it is not in the specs in Canada so I would not expect it to work for you, BLBL.
USA:
Canada:
Is that speed limit notification "adjustable"? Like warn me if I am over by XX and NOT when over by 1. Which brings up a pet peeve of mine. If.. a sign says "maximum speed 50" you are technically speeding by doing 50.. as it is impossible to drive at 50. 49.9999999999999999999 perhaps but never 50 as some decimal point way out will make it greater than 50. In days of old (analog) you could say 50 ish.. but a computer.. is very precise.
Conceptually right, but in real life not true. Every speedometer I've ever checked (timing between mile posts, and using GPS) under reports speed by 2-3 MPH at 60MPH. This is intentional by the manufacturers for a couple of reasons: 1) To allow for discrepancies in individual components and 2) To insure that they are not under reporting speed which could (would?) result in owners blaming the manufacturers for their speeding tickets. (Plus the computer most likely uses rounding and displays '50' as soon as the speed reaches '49.5'.)
Even given that, as tires wear the diameter reduces with the effect being there are more revolutions of the tire per mile which in turn artificially increases the reported speed. The same effect can be achieved by under inflating the tire, it's diameter at speed will be less than if properly or over inflated.
Also, a digital display is no more accurate than a analogue gauge if the raw data being used (drive shaft RPM as an example) is analogue and then converted to digital. It's just that the displayed information is more precise but not necessarily more accurate.
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Slightly.
You can choose from 1, 3, or 5 MPH over what the sign says; default setting is 1.
Notifications can be visual only or audible as well (some sort of beeping noise I imagine).
True.. but those speed cameras are computers with whatever accuracy (rounding) coded into it. And without any rounding would.. if set at say 50 MPH alarm at 50. Picky I know.. but the signs should be changed with "≤" (less than or equal to).
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If automated speed cameras are issuing traffic violations, there's no way they're going to do that for just 1-2 units over the speed limit. The law enforcement agency would be tied up all day long in court over the accuracy of the speed camera vs. the accuracy of a car speedometer. Neither the car or the camera has been adjusted so precisely that it could stand up to legal scrutiny for such a small margin. I think it's pretty common across the U.S. for the police to not even think about writing a ticket for less than 5 MPH over the limit because of this issue.
When did the topic change from in car speedometers to radar speed cameras?
If you want a 100% accurate in car speed reporting device it will have to be radar/sonar based that measures the elapsed time to traverse a given distance - it can't be any currently used technology in that they are all dependent, in one way or another, on vehicle components (tires specifically) that are by their very nature analogue. It most likely would have to be radar based since radar operates at the speed of light (186,000 miles per second) versus sonar which operates at the speed of sound (about 767 mph depending on air temperature, humidity and density) making radar orders of magnitude more accurate.
It can't be GPS based for a couple of reasons:
1 - GPS is by it's very nature delayed. Most commercially available GPS devices update the location at 1 second intervals so best case is it would report the speed you were traveling recently versus currently.
2 - GPS is only accurate within its' capabilities for a vehicle traveling on a level surface - if on an incline or decline the distance traveled on the surface of the road will differ from the linear distance traveled across the surface of the planet which is what GPS will measure.
Well, if we're really going to get picky then the signs will have to stay as they are since the limit is an absolute, not an 'about'.
In your suggested ≤50 MPH 50 is still the upper limit. You could kind of get around that by changing the signs to ~50 MPH (~ being 'about' or 'approximately') but now you have an enforcement issue in what constitutes 'about' (lawyers would love it though). Is it 3 MPH?... 5 MPH?, etc. Even if that last issue could be resolved the 'system' still fails because at some point the same problem exists with xx.99...999 versus xx.00.....001 when it comes to measuring the upper limit.
Bottom line - it ain't perfect, but it's the best we got.
It is the XX MPH ish that concerns me.. A very unknown value.. subject to the whim of a police department as they need money. Where ~10 over might be accepted in one jurisdiction.. 4 might be in the next.. and technically 0.1 could be next.
And.. it was only meant as a "peeve".. I did not mean to high jack the thread.
And.. it was only meant as a "peeve".. I did not mean to high jack the thread.
Yep, that has been an issue since the very first speed limit sign went up - and will likely be an issue until the last one comes down.
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Anyone else have issues with the RSA only picking up speed limit signs? I have a '20 HL Hybrid Platinum and it has NEVER picked up a yield or stop sign. What am I not understanding? Is there some setting I need to adjust? Thanks!
I have noticed it picking up a stop sign but all it did was put a small stop sign indicator on the display. I haven’t tried blowing through a stop sign yet to see if it gives me any warning. Similarly, I haven’t found a good place to test the Do Not Enter sign recognition.
There is no rsa on my 2020 xle or am I missing something
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