Speedo accuracy

[BombayMix]

I’m wandering what the expect accuracy of your speedo. Just all those signs showing your speed are always 2-3mph more the speedo says. Around here that could be enough to get a ticket with all the speeding cameras.

Should I get it checked?

 

[BombayMix]

I'm sure those signs overestimate ridiculously! (i'm assuming you mean the scoreboard ones which show your speed as you approach?)

I've passed one doing 27-28 indicated (about 25 on sat nav) and it's told me i'm doing 32!

Yep I mean those signs. I use the sat nav on my phone but the speedometer on it hard to read. I'll download a dedicate app to check.

If it was the other way around you could be at an indicated 40mph, but actually travelling at 44mph = not so good.

Exactly what I was thinking. But basically you are all saying the speedometer should be showing my speed as faster then it actually is. Mean those boards are way off!

Oh well as long as the boards show a happy face everyone happy in the back!

 

[BombayMix]

I wonder what will happen to speed limits if GPS based speedos start to be fitted as OEM on cars. At least all these doddering oap's may actually do 30

Aren't they abit slow to react to speed changes? The one on my phone seems to be.