[Talk-gb-westmidlands] Fwd: Re: 20mph zones in Birmingham to be rolled out

[Rob Nickerson]

That wasn't meant to be an off list reply. See below.
---------- Forwarded message ----------
From: "Rob Nickerson" <rob.j.nickerson at gmail.com>
Date: 12 Mar 2014 11:08
Subject: Re: [Talk-gb-westmidlands] 20mph zones in Birmingham to be rolled
out
To: "Matthijs Melissen" <info at matthijsmelissen.nl>
Cc:

Its valid until the next sign. In fact department to transport guidelines
are to NOT put repeater 30mph signs in built up street lit urban areas.

If a side road at 40mph joins a 30mph road then there will be a 30mph sign
at the end of the side road (just before it joins the main road).

Coventry rolled out a 20mph "zone" in the city centre. At each entry to the
"zone" they have to put in a speed "gate". This makes mapping much easier
as you just need to survey the gates (all roads inside are 20mph). When
Coventry did it they provided a map - so I just walked around with that,
photographed the precise gate location, mapped them in OSM as nodes away
from the road (less likely that they will be moved accidently) and then
split the road way and added maxspeed.

Is Birmingham releasing a map?

Rob
On 12 Mar 2014 10:53, "Matthijs Melissen" <info at matthijsmelissen.nl> wrote:

> "The city council in late 2012 voted almost unanimously in favour of a
> city-wide 20mph speed limit to improve pedestrian safety, lessen
> traffic congestion and reduce pollution. The roll out of 20mph speed
> limits across Birmingham will begin in the city centre and inner city
> wards despite resident objections, it has been announced."
>
> http://www.birminghampost.co.uk/news/local-news/20mph-zones-birmingham-rolled-out-6800676
>
> In Luxembourg, we used a similar roll-out of speed limits to
> completely map the speed limits in the city, following the council
> quarter by quarter as they rolled out the restrictions. Shall we try
> to do the same in Birmingham?
>
> These are the speed restrictions as we have them now:
>
> http://www.itoworld.com/map/5?lon=-1.85152&lat=52.45019&zoom=12&fullscreen=true
>
> By the way, what is the scope of a speed restriction sign in the UK?
> Is the sign valid until the next crossing, or until the next sign
> indicating a change of speed? I have seen both systems used in other
> countries.
>
> -- Matthijs
>
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