[TCUG] Re: Closely Associated Secondary Signals
- From: Grahame Bath <grahame.bath@xxxxxxxxxxxxxxx>
- To: tcug@xxxxxxxxxxxxx
- Date: Wed, 27 Sep 2006 11:54:21 +0100
Andrew
Every site is different and we locate the signals where they are best used.
Close associated always used opposite an "early cut off" for obvious
reasons,
but also many times where circumstances warrant this layout.
We have (at least) one cross roads where there are close associated
secondaries
on all approaches and this has dramatically reduced accidents by
encouraging
drivers to watch other vehicles rather than trust the signals.
In our opinion, there is no such thing as a standard layout - horses for
courses.
Regards
Grahame
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Grahame Bath
Senior Engineer, Intelligent Transport Systems
Network Management & Information Centre
Surrey County Council Transportation Service
Directorate of Services for Communities
020 8541 7346 (Tel) 020 8541 7366 (Fax)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"Andrew Ashton"
<andrew.ashton@blackp To:
<tcug@xxxxxxxxxxxxx>
ool.gov.uk> cc:
Sent by: Subject: [TCUG] Closely
Associated Secondary Signals
tcug-bounce@freelists
.org
27/09/06 10:36
Please respond to
tcug
Hi All,
I've been asked by our senior management to gauge how many authorities use
=
'closely associated secondary signals', as follows:
1. as standard on all sites;
2. only when circumstances dictate (i.e.. right turn accident issues,
impra=
cticable to use far-sided secondaries);
Traffic Advisory Leaflet 1/06 - General Principles of Traffic Control by
li=
ght Signals Part 1 of 4 states:
"Signal heads beyond the junction are known as secondary signals. The
displ=
ays must have the same information as the primary and may have additional
i=
nformation, which must not conflict with that shown on the primary. In
cert=
ain circumstances it may be undesirable, or impracticable, to position the
=
secondary beyond the junction. On these occasions the secondary may be on
t=
he entry side of the junction, beyond the stopline and primary positions
an=
d preferably on the offside. This is known as a closely associated
secondar=
y."
I assume from the above paragraph new designs shall always incorporate
far-=
sided secondaries with CASS only being used in certain circumstances.
I would appreciate your thoughts and comments.
Regards,=20
Andy Ashton=20
Blackpool Council =20
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