[jedberg]

That’s... actually true. It doesn’t matter how fast you’re going unless you’re speeding. And it distracts you by making you look down.

The only reason we don’t have that yet is because the car doesn’t know the speed limit everywhere all the time.

[kube-system]

I strongly disagree. I can think of a ton of reasons why a driver may need (or even be legally required) to know their speed regardless of speed limit:

* when speed restricted by equipment (trailer, temporary spare, etc)

* when observing advisory speeds

* when observing minimum speed requirements

* as a reference for judging appropriate speeds under inclement conditions

* as a reference for judging appropriate acceleration/deceleration rates when entering/exiting the roadway

[jedberg]

Of course an alert system would have to be able to understand all those things. That's why we don't have that kind of system.

A single number in isolation is rarely useful. Graphs with trends are useful. Alerts are useful.

The only reason we don't have alert based speeds is because it can't get all the necessary information to make a useful alert, so we compromise by telling you the number.

> as a reference for judging appropriate acceleration/deceleration rates when entering/exiting the roadway

A perfect example of why a graph would be ideal here, not a single number.

[kube-system]

> reference for judging appropriate acceleration/deceleration

> perfect example of why a graph would be ideal

A gauge chart, maybe? :D

But seriously, if we have a system that appropriately judges everything on my laundry list above, you probably won't need an alert system anymore because the cars will be self-driving.

[jaywalk]

I have that in my 2020 Ford, and you can tune the alert threshold from 0-5mph over the limit. I wouldn't even consider turning it on unless I could set it to at least 10mph, however.

The vehicle has a camera that looks out for speed limit signs, and then updates a little icon on the instrument cluster with the current speed limit. It works very well.

[zola]

I was driving a car like that few times, with beeping when the limit was exceeded. Annoying, but informative, unless road sign was limiting vehicle mass to 10t and not speed to 10km/h. It was carsharing vehicle, so I didn't bother to turn it off.

[timdorr]

Funny thing, this is actually a feature in Teslas. You can set it to chime once the speed limit is exceeded (in areas where it knows the limit). Although, I've never seen anyone turn that on.