In-car notification of speed limit

24

Comments

  • tho_2
    tho_2 Posts: 326 Forumite
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    Tiexen wrote: »
    Lots of dual carriageways with 40 / 50 / 60mph speed limits

    Those would have regular repeaters. If they don't then 70.
  • knightstyle
    knightstyle Posts: 6,989 Forumite
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    Our Garmin gives what they think is the speed limit and the speed you are doing goes red if you exceed it.
    BUT there are several roads I know of where the limit was reduced some time ago, two years at least, and the Garmin still shows the wrong limit.
    Yes it has been updated.
  • Car_54
    Car_54 Posts: 8,211 Forumite
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    tho wrote: »
    Those would have regular repeaters. If they don't then 70.
    Unless there are streetlights.
  • Car_54
    Car_54 Posts: 8,211 Forumite
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    AdrianC wrote: »
    It's a reminder from what you had to learn to pass your driving test.

    But it's very simple...
    Are there regular repeaters? Yes? That's the speed limit.
    No? So are there regular streetlights? Yes? 30mph.
    No? How many carriageways? One? 60mph. Two? 70mph.

    (I'm assuming you know what a carriageway is. It's not the same as a lane.)

    That's it! All of it! You now know EXACTLY what the speed limit is on every single road in the UK, with no more information than a second or two of looking out of the windscreen...

    Excellent summary, but be aware it may be different if you're not driving a car or motorbike, or towing a trailer..
  • Geoff1963
    Geoff1963 Posts: 1,088 Forumite
    GPS systems that tell you the speed limit, are as (un)reliable as those that tell you where the road is.

    Some top-end cars literally read the road signs, but they struggle with :
    Vegetation and dirt
    Parallel roads, and carriageway repair site limits
    Motorway gantries
    They also only tell you, just as you pass the sign ; which is awkward, because that's often where the speed cameras are.

    See if you can find a system which offers an insurance policy ( say £1000 / point ) if it gives a bad signal which causes a speeding penalty. I bet they all have some sort of disclaimer.

    At least every car has a human driver, imagine the chaos if anyone thought of letting computers drive them.
  • ElefantEd
    ElefantEd Posts: 1,189 Forumite
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    Aylesbury_Duck wrote: »
    You invent that, and I'll come up with a dial that can go right in front of a driver's nose to show what speed they are travelling.

    I think you're on to something here. I am wondering if some flashing lights at each side of the car could be fitted so that you could let other drivers and road users know which way you were intending to turn could be a winner too.
  • AdrianC
    AdrianC Posts: 42,189 Forumite
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    Car_54 wrote: »
    Unless there are streetlights.
    In which case... Go on, you can do it.
  • AdrianC
    AdrianC Posts: 42,189 Forumite
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    Car_54 wrote: »
    Excellent summary, but be aware it may be different if you're not driving a car or motorbike, or towing a trailer..
    True-ish. If you're driving a different type of vehicle, NSL may be different. But that's really just an upper cap - below that NSL for the vehicle type, all the limits apply identically, and the concept of NSL still applies.
  • Geoff1963
    Geoff1963 Posts: 1,088 Forumite
    If you're driving a different type of vehicle, NSL may be different.
    In order to display numbers or warn of over-speed, the clever gizmo that knows what the limit is, would often need to know the type of vehicle it is fitted to, or if it has a trailer, or a space-saver spare wheel. Any of these can mean a lower number.
  • Marvel1
    Marvel1 Posts: 7,171 Forumite
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    Seeing as this is money saving, I wouldn't waste my money on something so simple.
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