[Talk-GB] maxspeed changes

[Peter Miller]

On 27 September 2012 17:42, Jason Cunningham <jamicuosm at googlemail.com>wrote:

> As I mentioned earlier on it was speed limits for roundabouts along a dual
> carriageway that led to me doing a bit of research on UK speed limit
> legislation.
> My 'notes' are below
> http://wiki.openstreetmap.org/wiki/User:Jamicu/UK_Speed_Limits
>
> A roundabout does not meet the given definition of a dual carriageway
> provided by legislation, and therefore is classified as a single
> carriageway road. Therefore a NSL roundabout can either be a NSL Restricted
> road or NSL single carriageway road speed limit. Recently spotted that my
> satnav already new this.
>

That does make sense.

Slip road connected to dual carriageways also does not meet the definition
> of a dual carriageway. Slip roads on motorways are not covered by NSL
> legislation. The whole motorway network, which includes the slip roads, is
> deliberately outside NSL legislation. Motorways are "special roads" with
> separate legislation. If the slips roads are part of the Motorway Network
> then they're "special roads" covered the Motorway Legislation with a
> maxspeed for cars of 70 mph.
>

Thanks for the clarification. So what about slip roads on non-motorway
dual-carriageways? Are these 70mph or 60mph in your view?

Things can be different in Scotland. I concentrated on reading 'English'
> legislation and case law. Having read legislation and case law I'm happy to
> argue that British speed limit law is a mess.
>
> Once you understand the foibles of the legislation you'll start spotting
> stretches of road where signs are wrong or missing. The link below shows
> locations of street lighting around a junction.
> http://goo.gl/maps/I8uhr (yellow for lighting for main road, and orange
> for lighting of runabout which is technically a separate section of road.)
> There are clearly sections of road with 3 more street lamps that mean that
> unless otherwise signed the stretches of road are 'NSL Restricted' with
> speed limits for cars of 30mph. Roads leading up to the lighting are NSL
> single carriageway with speed limits cars of 60 mph. Legislation states
> there should be signs clearly advising you that NSL Restricted begins or
> small signs reminding you NSL single lane carries on, but they are missing
> (I haven't spotted nsl signs while driving or when double checking today
> using StreetView). Therefore the speed limit defaults to NSL Restricted.
> Since drivers would expect a sign for a change in speed limit they are
> unlikely to slow down to the NSL Restricted speed limit. Lack of signs for
> any other change in speed limit would mean it would be impossible to
> prosecute, but signs are not needed for NSL Restricted road and there is
> case law to support this. A problem for drivers, and for people trying to
> map speed limits.
>

I believe that when one starts finding errors on the ground it is a good
indicator that you are getting good at what you are doing!

Putting aside my little rant about missing speed limit signs, I think we
> could do with proper page giving some advice of speed limits if we intend
> to map them.
>

Or just  roll the details into the speed limits or maxspeed articles for
now as the same sort of questions are likely to appear in other countries?


Thanks,



Peter



> Jason
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