[Talk-GB] maxspeed changes

[Jason Cunningham]

On 30 September 2012 22:43, Peter Miller <peter.miller at itoworld.com> wrote:

>
> So what about slip roads on non-motorway dual-carriageways? Are these
> 70mph or 60mph in your view?
>
> Thanks,
> Peter
>

>From what I've read I think there's a problem with the term '*
dual-carriageway*' being commonly used to describe all the core parts of a
route rather than the road sections along a route that meet a particular
legislative definition (hope that's makes sense?). The slip road may be a
core part of a route that consists primarily of 'dual-carriageway', but
when considering speed limits it is wrong to consider a slip lane as part
of the dual-carriageway. My opinion is that a slip road is a separate road,
a road that joins two other roads. Therefore to find it's speed limit you
look at the road before you and the legislation. The definition for a
dual-carriageway is clear (if I've got the legislation correct!)

*“dual-carriageway road” means a road part of which consists of a central
reservation to separate a carriageway to be used by vehicles proceeding in
one direction from a carriageway to be used by vehicles proceeding in the
opposite direction*

A slip road is highly unlikely to meet the above definition, since normally
traffic travels in only one direction and there is no central reservation.
The legislation states *all* other National Speed Limit roads are
single-carriageway with a speed limit of 60 mph for cars. This all assumes
a lack of a 'system of street lighting'

Jason
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk-gb/attachments/20121001/da72d201/attachment.html>