[TCUG] Re: Mounting signal heads on lighting columns
- From: Saffer Howard <Howard.Saffer@xxxxxxxxxxxxxxxx>
- To: "'tcug@xxxxxxxxxxxxx'" <tcug@xxxxxxxxxxxxx>
- Date: Mon, 9 May 2005 14:55:18 +0100
We have installed signals on lighting columns (LCs) on schemes for many
years - and don't see any particular problems with this. If anything these
days, when we are trying to make a conscious effort to improve the
street-scene (or at least not to degrade it) as part of the design of
traffic proposals, it makes even more sense to do this.
Some comments and rules of thumb (if not exactly design rules):-
- We would never place a signal on a LC unless the proposed locations are
very close (within a few metres) - and it is almost always the LC that would
need to move to the proposed location of the signal pole (with the agreement
of the lighting designer for the scheme).
- We use special double base-compartment LCs (where the signal connections
and lighting connections are only accessible from the appropriate
compartment) - and the LC is also to a higher spec (stronger cross-section)
by comparison with normal LCs. The 8 holes (at the normal height for
mounting signal heads) are pre-drilled.
- The special LCs that we use have 3 gate holes (cable entry points) in the
base - at 120 degree angles (watch out when aligning ducts up to LCs when
using them as signal poles). We have a standard detail and manufacturer
details if anyone is interested.
Incidentally, we also try to amalgamate the design of signs on signal poles
and LCs, where this is practicable and doesn't unreasonably affect the
signal mounting, alignment, etc. (for example 'No entry' signs - with
lighting units on the back of signal poles - at junctions with one-way
streets). Again this can go some way to help reduce additional poles around
junctions.
Regards
Howard Saffer
Principal Engineer
Traffic Design - Street Force
Sheffield City Council
-----Original Message-----
From: mervyn.hallworth@xxxxxxxxxxxx
[mailto:mervyn.hallworth@xxxxxxxxxxxx]
Sent: 09 May 2005 13:35
To: tcug@xxxxxxxxxxxxx
Subject: [TCUG] Mounting signal heads on lighting columns
I am aware that some authorities have in the past mounted signal heads on
lighting columns - we have managed to avoid this to-date but are now being
asked to re-consider it for reasons of 'street clutter reduction'. We can
think of all sorts of 'negative' reasons why we don't like the idea
(compromise on pole positioning, mains isolation, weakening of columns by
drilling etc.). Can I ask if anyone routinely does this nowadays, and what
they see as the real problems/solutions?
Mervyn
Leeds
0113 2476750
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