August 2013 Technical Requirements for Remote Controlled Temporary Traffic Management Signs for use on the Highways Agency Strategic Road Network Page 1 of 14
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Technical Requirements for Remote Controlled Temporary Traffic Management Signs for use on the HA Strategic Road Network Technical Requirements for Remote Controlled Temporary Traffic Management Signs Contents Chapter Page 1. Introduction 4 2. Functional Requirements 6 3. Optical Requirements 9 4. Electrical Requirements 10 5. Interface Requirements 11 6. Normative References 12
1. Introduction Scope 1.1. This Technical Requirements document details the functionality and performance requirements for remote controlled temporary traffic management signs for use on the Highways Agency trunk road and motorway network. 1.2. This Technical Requirements is applicable to both fixed and portable devices. Approval 1.3. There is a statutory requirement under direction 56 of the Traffic Signs Regulations and General Directions 2002 (TSRGD) that any equipment (including the content of all instructions stored in, or executable by it) used in connection with the signs is type approved in writing by the Secretary of State or the Scottish Ministers (Statutory Approval) before they may be placed on or adjacent to a road. 1.4. 'Road' in England or Wales is defined as 'any highway and any other road to which the public has access and includes bridges over which a road passes' (Road Traffic Act 1988 section 192 (1)). In Scotland, the definition is extended to include any way over which the public have a right of passage (Roads (Scotland) Act 1984 section 151(1)). 1.6. Within this Technical Requirements document, "The Product" is defined as all components necessary to provide a complete operational unit meeting the requirements of this document and the common requirements defined in TRG 0600. 1.7. Section 64 of the Road Traffic Regulation Act 1984 defines a "traffic sign" as "any object or device (whether fixed or portable) for conveying, to traffic on roads or any specified class of traffic, warnings, information, requirements, restrictions or prohibitions of any description" The Product is therefore considered to be a traffic sign as it provides information to road users. 1.8. The Product must comply with the Code of Connection Procedure specified in MCH1514. Mutual Recognition 1.9. Any reference, in this document, to a British Standard, or to a British Standard which is an adopted European Standard, is to be taken to include a reference to a corresponding EEA Standard. Implementation 1.10. This Technical Requirements document will be immediately implemented from the date of issue. Approvals will be conducted against this Technical Requirements and TRG 0600. 1.5. Statutory Approval (Approval) must be in accordance with the requirements for Self-Certification set out in TRG 0600. Page 4 of 14
Definitions 1.11. EEA Standard means a standard or code of practice of a national standards body or equivalent body of any EEA State; any international standard recognised for use as a standard or code of practice by any EEA State; or a technical specification recognised for use as a standard by a public authority of any EEA State. 1.12. A reference to a corresponding EEA Standard, in relation to a British Standard or a British Standard which is an adopted European Standard, is a reference to an EEA Standard which requires a level of performance equivalent to that required by the British Standard or British Standard which is an adopted European Standard; 1.13. EEA State means a state which is a contracting party to the EEA Agreement. 1.17. Point to Point Communications means the direct communication between a control device and The Product without the use of a third party communications bearer. Glossary of Terms 1.18. A comprehensive glossary of terms is given in Highways Agency document TA84 Code of Practice for Traffic Control and Information Systems for All-Purpose Roads. EC Directives 1.19. The Product must comply with the following regulations transposed from EC Directives: The Electrical Equipment (Safety) Regulations 1994 incorporating the requirements of The Low Voltage Directive 2006/95/EC. The Electromagnetic Compatibility Regulations 2006 incorporating the requirements of The EMC Directive 2004/108/EC. 1.14. EEA Agreement means the Agreement on the European Economic Area signed at Oporto on 2nd May 1992 as adjusted or amended. 1.15. Controlling Authority s Control System means a device or software used to control and monitor The Product from a location not directly adjacent to The Product, such as a depot or control centre. 1.16. Operated Locally means the use of a device to control and monitor The Product from a location adjacent to The Product, such as the roadside. Page 5 of 14
2. Functional Requirements 2.1. The Product must be a selfcontained unit and shall comply with regulation 58 of TSRGD. 2.2. The Product must only be used at road works to regulation 53 of TSRGD and individual units shall be capable of displaying one or more of the following diagrams and their permitted variants: 670 671 7001 7202 2.3. Where required by TSRGD and Traffic Signs Manual, Chapter 8, The Product must also display the following supporting diagrams and their permitted variants: 572 645 2.4. The supplier shall note that the devices may be implemented on carriageways employing between 2 and 5 lanes. Consideration should be given to the supply of devices with a range of display sizes to allow the implementation of those permitted variants of diagram 7202. Operation and Timing Start up Sequence 2.5. Upon switch-on or restoration of power supply The Product must display the message requested by the control system. 2.6. If no message is requested then The Product must transition to or remain blank. Display The initial message displayed to the road user when The Product is being set must be the message requested by the control system. Where this isn t possible, The Product must remain blank, then immediately set the message as requested by the control system. 2.7. The Product must take no longer than: 20 seconds for Electromechanical Products, or 20 milliseconds to Optoelectronic Products from receiving a command from the control system to displaying the requested message. 2.8. When The Product is not operational the display must remain blank and appear black or grey. Power Supply Interruptions 2.9. In the event of a power supply interruption to The Product equal to or less than 300ms The Product must continue to function correctly. 2.10. In the event of a power interruption to The Product greater than 300ms The Product must shutdown in a safe manner. On restoration of power The Product must follow the sequence specified in 2.5. Page 6 of 14
Reliability 2.11. Electromechanical Products must have a failure rate of less than one in 1250 operations. 2.12. An operation is defined as the setting, display and removal of the message from the display surface 2.13. Optoelectronic Products must have an MTBF of at least 30,000hours. 2.14. A failure is defined as The Product s inability to: Display the correct message when requested by the control system Stop displaying a message when requested by the control system Status and Fault Monitoring 2.15. The Product must monitor the status of all display elements and provide a positive confirmation to the control system that a requested message has been successfully set. 2.16. The Product must monitor all utilised power sources and report their status to the control system. 2.17. The Product must monitor for faults and report them to the control system. Product elements to be monitored for faults include: communications optoelectronic components power systems 2.18. The Product must keep a log, in non-volatile form, of all faults that have occurred, including date and time stamped unique fault identification, for at least 28 days. The log must be retrievable and interrogatable both locally and by remote means. Fault Modes 2.19. The Product must monitor its own operation and enter a safe mode within 100ms if it detects a critical fault condition. 2.20. A critical fault condition is defined as a fault which may either cause the display to activate at a time other than when requested by the control system or lead to a message being displayed that might be misinterpreted or incorrect. Construction 2.21. The Product and its housing must meet the requirements of BS EN 12966-1 to environmental classes shown in Table 2.1. Environmental Parameter Temperature Protection Pollution Table 2.1 Product Configuration Class T1 P3 D2 2.22. The Product must allow local configuration of communications settings. electromechanical components control circuitry Page 7 of 14
Additional Requirements 2.23. Individual Products may be designed to include the facility to rotate the Product through 90 degrees, in either direction from its parked location about the vertical axis with an accuracy of 1.0 degrees and maximum backlash of 0.5 degrees. 2.24. If provided, this facility must be achieved using an electromechanical or equivalent actuator. In addition: The rotation of the sign shall take no longer than seconds from parked to operational, and vice versa. The rotation may include slow-start and slow-stop in order to minimise undue wear. Its operation must be monitored for status and faults, and these shall be reported to the control system in accordance with 2.17. The reliability of this facility shall be in accordance with Clause 2.11. 2.25. Individual Products may be designed to include facilities to allow remote maintenance access to the sign in order to diagnose and resolve faults. Page 8 of 14
3. Optical Requirements General 3.1. The Product may make use of retro-reflective or optoelectronic elements to achieve the functional requirements. Retro Reflective Elements 3.2. Products making use of retroreflective elements must conform to CR1 and RA2 as per BS EN 12899-1. Optoelectronic Elements Dimming 3.5. Not precluding the requirements of BS EN 12966-1, The Product must provide two levels of luminance, with the Dim representing an ambient Luminance level of less than 390lux and Bright being values 390lux and above. 3.6. The Product must be configurable to allow luminance levels to be set by either the sign or the control system. 3.3. Products making use of optoelectronic elements must conform to optical performance requirements shown in Table 3.1, as defined in BS EN 12966-1:2005+A1:2009 - Road Vertical Signs - Variable Message Signs Part 1. Photometric Parameter Optical Performance Colour Luminance Luminance Ratio Beam Width Table 3.1 C2 L3 R3 B3 3.4. The colours permitted for use are yellow, white and red, as required to meet Clause 2.2 and 2.3 of this document, as defined in BS EN 12966-1:2005+A1:2009 - Road Vertical Signs - Variable Message Signs Part 1. Page 9 of 14
4. Electrical Requirements 4.1. The Product must incorporate a power source with sufficient capacity to operate, without external power for a minimum of 18 hours. 4.2. Any battery back-up arrangements employed must be such that the recovery time T R is less than five times the back-up time T B, where: 4.7. Where battery back-up is provided, The Product must include the facility to re-charge the back-up battery using external energy generation. 4.8. The re-charging facility must form part of The Product s power system and must be status monitored as per Clause 2.16. T B is the maximum time for which the battery back-up arrangements are required to support autonomous operation; T R is the time taken for the battery back-up arrangements to recharge from a point where autonomous operation has occurred for a period equal to T B to a point where the battery back-up arrangements are capable of supporting autonomous operation for a period of at least 80% of T B. 4.3. T B is as per Clause 4.1. Additional Requirements 4.4. The Product may be designed to operate from a mains power supply. 4.5. Where a mains power supply is used, the Product must incorporate the facility to automatically switch to the backup battery in the event of a mains failure 4.6. This change over between power sources must not interfere with the operation of the Product given the restrictions of 2.9 and 2.10 above. Page 10 of 14
5. Interface and Communications Requirements 5.1. The Product must be designed to make use of wired and/or wireless communications. 5.2. Where The Product is operated by a control system located in the Controlling Authority s premises then Clauses 5.3 to 5.6 apply: 5.3. The Product must incorporate an interface to allow connectivity with a control system. 5.4. The Product must be compliant with UTMC TS-003. 5.5. Data exchange with the control system must be achieved using the VMS MIB (UM/003) as defined in UTMC TS-004. 5.6. The Product must use a NRTS service to connect to the Controlling Authority's control system. These services will be a NRTS Service Category 8 wired connection, or NRTS SIM based provision for wireless connection. Exact connectivity services must be agreed with NRTS. 5.7. Where The Product is portable and operated locally, then a point to point communications system may be used. Page 11 of 14
6. Normative References 6.1. Where undated references are listed, the latest issue of the publication applies. British Standards 6.2. The British Standards Institution, London, publishes British Standards. Contact: +44 (0) 845 086 9001 www.bsigroup.co.uk/en-gb/standards/ BS 7671 BS 7987 (HD 638) BS EN 12899-1 BS EN 12966-1 BS EN 41003 BS EN 50293 BS EN 60068 2-29 BS EN 60309-2 BS EN 60446 BS EN 60529 BS EN 60950 PD IEC TR 62380 Requirements for Electrical Installation Road Traffic Signal Systems Fixed, Vertical Road Traffic Signs Road Vertical Sign - Variable Message Traffic Signs Particular Safety Requirements for Equipment to be Connected to Telecommunications Networks Electromagnetic Compatibility Road Traffic Signal Systems Product Standard Environmental testing. Test methods. Environmental testing procedures. Plugs, socket-outlets and couplers for industrial purposes. Dimensional inter-changeability requirements for pin and contact-tube accessories Basic and Safety Principles for Man-Machine Interface, Marking and Identification of Conductors by Colours or Numerals Degrees of Protection Provided by Enclosure IP Code Information Technology Equipment - Safety Reliability data handbook. Universal model for reliability prediction of electronics components, PCBs and equipment Specifications 6.3. Specifications published by the Highways Agency. TR 2130 TRG 0600 Download from: http://www.tssplansregistry.org Environmental Tests for Motorway Communications Equipment and Portable and Permanent Road Traffic Control Equipment Self-Certification Procedures for Statutory Approval of Traffic Control Equipment Page 12 of 14
Legislation The Traffic Signs Regulations and General Directions 2002 (SI 2002/3113) (as amended) Directive 2004/108/EC Electromagnetic Compatibility Regulations 2006 (SI 2006/3418) Directive 2006/95/EC The Electrical Equipment (Safety) Regulations 1994 (SI 1994/3260) Page 13 of 14
Appendix A Mounting Arrangements A.1 Depending on the application the Product may be mounted for use in portable or fixed applications. Portable Applications A.2 Products designed to be used in a portable capacity must comply with the requirements of BS 8442. Fixed Applications A.3 Products designed to be used in a fixed capacity must comply with the requirements of BS EN 12899. Page 14 of 14