Vorpal wrote:pete75 wrote:If it's not an online navigation system it will rely on the user updating the maps and these are rarely produced more than quarterly and then a lot probably don't bother anyway.
Equipment to read the signs is more reliable and always up to date - it even recognises temporary speed limits for roadworks. The problems you and pwa describe are ones of highway maintenance not vehicle technology.
The best thing is for sign recognition to work in conjunction with other technology. Neither is perfect, and it would minimise error.
I wasn't trying to suggest that the challenges were insurmountable; only that they exist. Anyway, you don't think they are suddenly going to find more money for updating signs, trimming hedges, etc?
Well if the authorities don't provide signage as required by law they can't expect people to abide by the law can they? In the UK streets with street lighting have an implied speed limit of 30mph unless there are signs to the contrary. 40 and 50 mph limits have to have clear signage and if this is absent or unreadable due to poor maintenance then the limit doesn't apply.