[TCUG] Re: SRL Traffic Systems 'PEDLIGHT'
- From: "David Overton" <dtoverton@xxxxxxxxxxxxxx>
- To: <tcug@xxxxxxxxxxxxx>
- Date: Wed, 20 Dec 2006 20:43:22 -0000
Peter
I am not on such safe ground here but TR 2503 does not describe Puffin (or
any other) pedestrian crossing techniques or regulations and equipment
meeting this specification would not necessarily run a Puffin (or Pelican or
Toucan or Equestrian) sequence. The TSRGD diagrams referred to in TR 2503
(No 4003) are for simple pedestrian facilities with red/green man, fixed ped
green (VA to vehicles), no flashing amber or flashing green man or
pedestrian detectors. The question is whether the TR 2503 spec is intended
to be used for a single vehicle phase and a single ped phase. I know that
some years ago Bristol City experimented with POTS (pedestrian only traffic
signals) based on the earlier spec (TR 2204) using conventional signals in
barrels and were quite pleased with the result.
I wrote this summary in August 2000 intended for inclusion in MCH 1969
"Compendium of Examples" but as it did not make it into the final document I
guess there must have been some reluctance to consider it to be "good
practice"
POTS - Pedestrian Operated Traffic Signals.
Location: Park Street (near Unity Street), Bristol.
Characteristics
Road works on Park Street required the temporary removal of a well-used
Pelican crossing near the junction with Unity Street. It was desirable to
provide a controlled crossing for pedestrians during the progress of the
works but it would need to be relocated as the works progressed.
A Pelican crossing requires a procedure (including advertising) before it
can be installed or moved and it would not be feasible to repeat this
process several times during the timescale of the project. In addition,
zig-zag markings would need to be reinstalled each time the crossing was
moved.
A crossing could be constructed using portable traffic signals (mounted on
tripods as for shuttle working at roadworks) but these would not be legally
enforceable as the equipment would be being used for an application for
which it was not type approved.
The solution is POTS, a Pedestrian Operated Traffic Signal using a type
approved traffic signal controller and standard traffic signals in barrels.
The use of traffic signals used this way is covered by TR 2204 (Pedestrian
Facilities at Temporary Stand-alone Traffic Signals). If available, a type
approved controller meeting the requirements of this specification can be
used but in this case the controller is a standard junction controller to TR
0141.
-----Original Message-----
From: tcug-bounce@xxxxxxxxxxxxx [mailto:tcug-bounce@xxxxxxxxxxxxx]On
Behalf Of Bull Peter
Sent: Wednesday, December 20, 2006 4:40 PM
To: 'tcug@xxxxxxxxxxxxx'
Subject: [TCUG] Re: SRL Traffic Systems 'PEDLIGHT'
Thanks for this comprehensive explanation David, the only thing I would add
is to emphasise that a temporary pedestrian crossing will also need to meet
all the requirements of the appropriate one of the pedestrian crossing
regulations.
Peter Bull
-----Original Message-----
From: David Overton [mailto:dtoverton@xxxxxxxxxxxxxx]
Sent: 20 December 2006 15:41
To: tcug@xxxxxxxxxxxxx
Subject: [TCUG] Re: SRL Traffic Systems 'PEDLIGHT'
Be careful to check what the "type approved" equipment is approved for. It
is important to distinguish between "temporary" and "portable" signals.
They are defined in TA 84
temporary signal:
A traffic signal using the same type of signal equipment as permanent
signals but which is installed for a limited period of time (e.g signals in
barrels)
portable signal:
A traffic signal designed to be moved from place to place.
Pedestrian signals may be included in "temporary" signals installations
because they are governed by the same regulations as permanent signals.
Pedestrian signals are not permitted at "portable" signal installations.
The control equipment may be approved as a portable traffic signal
controller but this does not include approval for use with pedestrian
aspects.
Andrew Hancock says:
The actual brochure for the product says that it is fully compliant with TR
2503 "Performance Specification for Pedestrian Facilities at Temporary
Stand-alone Traffic Signals".
TR 2503 allows such things as radio linking and battery power but it still
refers to "temporary" not "portable signals". The signals are required to
comply with the regulations for permanent signals in physical appearance and
layout (TSRGD Regulation 33). There are also requirements not normally
found in portable signal equipment such as SA/SDE capability.
Claiming compliance with this specification is not the same as being Type
Approved. Anyone can check the Type Approval status of any equipment at
www.tssplansregistry.org. (You will need to register to get access). This
gives acces to the list of Type Approvals MCS 215. There are currently no
approvals issued against TR 2503.
David Overton
-----Original Message-----
From: tcug-bounce@xxxxxxxxxxxxx [mailto:tcug-bounce@xxxxxxxxxxxxx]On
Behalf Of R.J.Perry@xxxxxxxxxxxxxxx
Sent: Tuesday, December 19, 2006 3:28 PM
To: tcug@xxxxxxxxxxxxx
Subject: [TCUG] Re: SRL Traffic Systems 'PEDLIGHT'
And the controller is to what spec?
Regards and a Merry Christmas
Rob Perry
Senior Engineer, Traffic Control and Systems Dorset Engineering Consultancy,
Dorset County Council Pullman Court, Station Approach, Dorchester DT1 1GA
Tel 01305 225357 Fax 01305 225301
"Andrew Hancock" <andrew.hancock@xxxxxxxxxxxxxxxxxxx>
Sent by: tcug-bounce@xxxxxxxxxxxxx
19/12/2006 13:40
Please respond to tcug
To: tcug@xxxxxxxxxxxxx
cc:
Subject: [TCUG] Re: SRL Traffic Systems 'PEDLIGHT'
This is something we get asked for a lot in Stoke by the public as they see=
m to think it is a legal requirement for us to provide a temporary crossing
faci= lity at roadworks where a permanent crossing has to be switched off so
I did some research into it.
This is taken from LTN 1/98 "The Installation of Traffic Signals and Associ=
ated
Equipment":
8.09 Care should be taken to safeguard pedestrian safety during
roadworks
within the area of the work site and particularly at or near pedestrian
=20 crossing facilities. Temporary pedestrian facilities may be
provid=
ed on
temporary signals as long as the area where pedestrians should cross is
clearly marked.
This suggests that pedestrian facilities could be used at temporary signals
when working near a pedestrian crossing which has to be switched off.
The actual brochure for the product says that it is fully compliant with TR=
2503
"Performance Specification for Pedestrian Facilities at Temporary
Stand-alone Traffic Signals". (This=20can be found at the TSS pla= ns
registry website: http://www.tssplansregistry.org )
This specification states that the product should comply with TSRGD Diagram
3000, Regulation 33, the signals shall comply with TSRGD Diagram 4002.1,
Regulation 47, and=20the push button shall comply with TSRGD Diagram 4003=
and Regulation 47.
The unit uses peak elite signal heads and AGD push button units all of which
are fully compliant with the TSRGD regulations.
With regards to approval for the product as a whole,=20this comes under the
requirements for Self-Certification set out in TRG 0600 (http://www.
tssplansregistry.org) which allows companies to design, test and self certi=
fy a product to a specific Technical Requirements Specification. This
specificat= ion also gives regulations that it must be compliant with when
using radio sign= als.
Again in the brochure this is something that the company states the equipme=
nt fully complies with and so I believe the product could legally be placed
on= the highway with no site specific authorisation being required.
The one thing that would be of interest is how drivers react to the signals.
Drivers tend not to treat temporary signals with the same respect as perman=
ent ones and so when they see the other side stop they may drive through the
red signal which would create a major safety issue.
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