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Speed Limit Indicator

 
Old 06-06-2019, 10:58 AM
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Speed Limit Indicator

Is it based on a database, or is it based on reading the posted signs by camera? I'm sure the salesperson said it was by camera, but we all know how reliable salesperson speak is.

At first, I was sure it was from a database. Then I noticed it was accurate while I was driving in a two year old construction zone on the local Interstate. (55 vs 65). If it camera based, I suspect it won't always pick up every sign.

Not a big deal, and I am currently out of town, so I dont have the digital manual available to look it up. Thanks
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Old 06-06-2019, 11:17 AM
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I'm 90% sure it's based off of GPS fed information.

There are times where I get onto a road and I haven't passed any speed limit signs yet, but the speed limit is already updated.
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Old 06-06-2019, 11:19 AM
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Originally Posted by JB in AZ View Post
Not a big deal, and I am currently out of town, so I dont have the digital manual available to look it up. Thanks
https://owners.acura.com/vehicle-inf...2019&model=RDX

here you go
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Old 06-06-2019, 11:41 AM
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Probably based on database info. It seems to match Waze speed limit info.
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Old 06-06-2019, 11:55 AM
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I find it does NOT match Waze. Waze always seems to be correct. The Acura often is not correct. The Acura also often show no speed limit when Waze does show one.
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Old 06-06-2019, 12:39 PM
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So page 128 of the 2019 manual says it is "based on information complied from the navigation system"
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Old 06-06-2019, 02:38 PM
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Originally Posted by RDXguy View Post
I find it does NOT match Waze. Waze always seems to be correct. The Acura often is not correct. The Acura also often show no speed limit when Waze does show one.
Might also depend on location and if you have several road changes in road conditions between Acura updates. I don't think we had and major road changes other than repaving in the areas I mostly drive in NM in the last +10 years (ABQ, Santa Fe, Gallup, Clovis, Las Cruces). Can be different for your area and Acura Navi can't keep up. The major advantage of having Apple Car Play available. The current posted speed limit isn't a piece of info I normally need when driving.
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Old 06-06-2019, 06:56 PM
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The Honda Accord reads the signs, the Acura reads its database.
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Old 06-06-2019, 10:59 PM
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Originally Posted by Madd Dog View Post
The Honda Accord reads the signs, the Acura reads its database.
That's what I thought. Does anyone else think this is backwards?
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Old 06-07-2019, 04:45 AM
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If the technology to “read signs” really works well, then that sounds far better. It should always be accurate. As compared with an outdated data base.
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Old 06-07-2019, 07:00 AM
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Originally Posted by RDXguy View Post
If the technology to “read signs” really works well, then that sounds far better. It should always be accurate. As compared with an outdated data base.
The one issue I have with the method that reads signs, is when the road you're on has different speed limits for different vehicles. The display will always show the speed of last sign it passed. Even when driving through a School Zone at midnight, it shows that speed. This is how it works in my wife's CX-5 anyways. Also, until you pass a sign, you get no display.
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Old 06-07-2019, 07:36 AM
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When I test drove the Accord, it got a sign wrong. It was a year ago, and I don’t recall the details, but I was WTF at the in-car speed limit, and I realized the car read the wrong sign.
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