Level Crossing Axle Counter Detection System Design
Contents
1. Island Conventional Track Circuit H LEGEND NOTES amp LX approach Whoo Sensor 1 Category 2 Notice Board worded Axle Counter white lettering on black background configuration as per SPS 003 Sect 4 6 indicator Board lottors and background non reflective 2 Axle Counter 2 section arrangoment Di Type with be HO Notice Board 3 All axle counters connected to Axle Counting Board ACB in isolated operation OGO Main Line Indicator equipment room Baan alee U 4 Island Conventional Track Circuit may be DC track with IRJ s AFO Island Track Module ote Not all detalts shown Not to scale Layout C cre 408 Active Level Crossing Protection Tht ARTIC Saal Sarar ARTIC ESN Techical NctewLX Ane Axle Counter Control Counters This arrangement is an improved arrangement over option A with regard to hi rail operations i e hi rail vehicles may enter or depart the crossing via the conventional island track circuit section Independent axle counter track sections are used for the approaches Island track protection is provided by a time delay typically 8 seconds on the axle counter section providing protection for the train passing over the crossing Note 1 reliable detection of the rail vehicle wheels is maintained through the scrubbing of the rail head by road motor vehicles Note 2 with agreement of the local Team Manager it is preferable to identify or construct an alternative hi2. AUSTRALIAN RAIL TRACK CORPORATION LTD Engineering Signals Instruction ESI 03 02 Level Crossing Axle Counter Detection System Design Where Frauscher ACS2000 Axle Counter System are proposed Applicability ARTC Network Wide v RIC NSW CRN v Amendment Record Version Date Reviewed Clause Description of Amendment 1 0 18 Dec 09 First issue of Instruction Main Points e Configuration requirements e Reset Miscount Situation accommodate hi rail vehicle operations e Configuration checking amp test procedures 1 Introduction ARTC is proposing the general and widespread use of the axle counter train detection system for level crossing activation Axle counters have significant advantages over rail to wheel contact systems where light rail traffic or contaminated rail contact surfaces results in poor reliability for train detection Another use may be to overlay a separate axle counter train detection system over an existing signalling system to reduce complexity interface and ultimately cost Axle Counter systems are already in use for points track detection and single line block systems and this instruction provides guidance on the use of axle counter systems particularly for active rail level crossing protection installations Special requirements are necessary to reset axle counters when incorrect axle counts occur and lock out the system Experience has shown that axle cou
3. Instruction Resetting Axle Counters ESI 06 02 8 11 06 ARTC New Equipment amp Systems Type Approval Axle Counter System 08 08 10 009 Apr05 ARTC Engineering Standard Signalling Level Crossings ESD 03 01 Sep 09 ARTC Technical review workshop May09 Date of last revision 18 Dec 09 Page 14 of 14 This document is uncontrolled when printed See ARTC Intranet for latest version
4. 4 Double usage of A2 B1 and B2 C1 heads for approach and island track sections Not all detas shown Not to scale Layout A use Active Level Crossing Protection HAT ARTO Signal Standard C ESN Technical NetesiLX Ax Axle Counter Control Courses This arrangement is suitable for upgrading of a typical single line level crossing with 3 track circuits i e Up approach island and down approach tracks as the three axle counters can readily substitute the existing track circuits This is the preferred design configuration Date of last revision 18 Dec 09 Page 3 of 14 Version 1 0 This document is uncontrolled when printed See ARTC Intranet for latest version Engineering Signals Instruction ARC Level Crossing Axle Counter Detection System Design ESI 03 02 Single track plain track environment two axle counter overlapping sections Single Track Plain track environment Two Overlapping Axle Counter Sections Layout B Axle Counter Reset Box Level Crossing Equipment Hut dion determined on a sie by sie basis Notice Board note t Note Board note 1 2 To Country mainline down Notice Board note 1 Notice Board note 1 Down approach Axte Counter Section 1 Up approach Axle Counter Section 2 NOTES 1 Category 2 Notice Board worded Axle Counter white lettering on black background configuration as per SPS 003 Sect 4 6 Indicator T LX approach IEE Whoo Sonsor
5. Page 10 Section 6 1 Maximum loop resistance for wheel sensor RSR180 is 200 ohm This implies a theoretical cable length of gt 10km D10002 04 1 2 page 43 section 3 2 Rail Types Many rail profiles are used on the ARTC network particularly on light rail branch lines the following restrictions apply to the mounting of the wheel sensor to a rail profile Min height of rail 120mm min width of head of rail 50mm max width of head of rail 78mm min width of web of rail 9mm max width of web of rail 18mm In addition to the above restriction of the wheel sensor profile to rail there are limits relating to the ability to mount the rail claw mounting relative to the size of the rail Reference OEM s design application manual Over voltage Protection Boards The over voltage protection board BSI must be fitted as detailed in the Frauscher application guidelines Wheel Sensor Type RSR180 type wheel sensor is the only approved version at this time When setting up the axle counter head in relation to the rail height the ARTC approved go no go gauge is to be used Type Approval The current type approved Axle Counter System and Sub System components are listed on ARTC s Internet site Supply Source Two options are available 1 Separate Supply Generally it is necessary to connect the axle counter system to a discrete 24VDC battery supply to meet the operating input voltage range of 19 to 72 volt DC The supply
6. endorsed by Signalling Standards Engineer 3 System Configuration Requirements The following configuration items are to be set in the ACS2000 data e Mode Jumpers e Identification Code Ref D2167 2 page 16 section 4 2 e Configuration File Ref D2167 2 page 16 section 5 e The Character Site Name is to be in the format Town Street name Cerberus e Crossing identification number NNN Cerberus e The location is set in kilometres and metres as kkk mmm Cerberus e Note time is taken from PC on each connection and is not stored on ACB 4 Site Configuration Scenarios Directional axle counter heads are used to provide direction functionality The circuitry in the axle counter head reports the direction of travel over that head detector to the processor in the Axle counter Board Several typical design scenarios will be encountered and these are described below other non typical situations will occur and will require special consideration as they occur Hi Rail Put on and Take off Level crossings may be used as locations for the Put on and Take off of Hi Rail vehicles Whenever this is done on an Axle Counter section then the axle counter is required to be Reset It is preferred that the axle counter section is not used as the standard location for Put on and Take off There should be consultation with the respective Team Manager to address this situation and where practicable identify or construct an alternative lo
7. must be filtered The capacity of the battery should operate the ACS2000 system for 36 hours continuously 2 Alternatively a converter can be installed connected to the level crossing battery A type approved 12VDC to 24VDC converter may be used to supply the ACS2000 system Date of last revision 18 Dec 09 Page 11 of 14 This document is uncontrolled when printed See ARTC Intranet for latest version Engineering Signals Instruction AR IC Level Crossing Axle Counter Detection System Design 7 7 7 8 7 9 7 10 7 11 7 12 7 13 7 14 7 15 Version 1 0 ESI 03 02 Note Either arrangement must provide a highly filtered DC supply The ACS2000 is highly sensitive to spikes and over voltage Failure to address this issue will result in destruction of the ACS components Cable connectors Cable connectors attached to the rear of the card file are to be clearly labelled as the coding on each ABP backplane is identical Clear wiring segregation labelling is to be used to assist in clear identification D10002 04 1 2 page 41 section 3 1 Reuse of existing cables It is generally not permissible to use existing cables other than approved new cables specifically installed for the connection between the axle counter head and the BSI Cable Termination Frame unless specifically approved D10002 04 1 2 page 43 section 3 2 Cable Shielding Cable shielding if provided shall be connected to earth D10002 04 1 2 p
8. rail take off clear of the crossing and use Layout A Date of last revision 18 Dec 09 Page 5 of 14 Version 1 0 This document is uncontrolled when printed See ARTC Intranet for latest version ESI 03 02 Engineering Signals Instruction Level Crossing Axle Counter Detection System Design Single track siding track environment three axle counter sections with siding in approach Single Track Siding track environment Three Consecutive Axle Counter Sections NSW Main Line Indicator MLI Arrangement Layout D Axle Counter Reset Box Level Crossing Equipment Hut Postion determined on a site by ade basis Notice Board note 1 Nooo Board noto 1 __ f moa To Country mainline down C2 Notice Board note t Notice Boord note 1 i z Island Axle Counter Section Notice Board note Up approach Axle Counter Section 2 Down approach Axte Counter Section 1 PP Or track arcuit NOTES amp LX approach SS Whoo Sonsor 1 Category 2 Notice Board worded Axle Counter white lettering on black background configuration as per SPS 003 Sect 4 6 Indicator Board letters and background non reflective Xe Type f with bet HO Notice Board 2 Axle Counter 3 section arrangoment with siding in approach 3 All axle counters connected to Axle Counting Board ACB in isolated operation HOG Main Line Indicator UO equipment room 4 Double usage of A2 B1 and B2 C1 he
9. 9 Page 12 of 14 This document is uncontrolled when printed See ARTC Intranet for latest version Engineering Signals Instruction i Level Crossing Axle Counter Detection System Design 7 16 7 17 7 18 7 19 7 20 7 21 Version 1 0 ESI 03 02 On tracks where suspension of services occurs eg seasonal wheat lines a special operational procedure is required to ensure the axle counter is activated by use of a test damper prior to the resumption of train services NOTE ONE TEST PLATE IS TO BE PROVIDED AT EACH INSTALLATION FOR MAINTENANCE PURPOSES Surge Suppression Surge protection shall be provided in accordance with ARTC specification SCP 04 Lightning and Surge Protection Requirements for Electronic equipment subject to Category C exposure Level Crossing Monitor I nterface A level crossing monitor interface is to be provided in accordance with the standard requirements Main Line Indicators MLI Where an MLI is used layout D is to be used ACB Version For new works only the latest approved version of module together with the associated maintenance software may be used All modules at a site included in the same circuit book shall use the same versions of modules on the same ARTC acceptance certificate Standards amp Procedures update Operations maintenance and Safeworking procedures including amendments to routine maintenance and testing standards e g ESM 07 01 ESM 07 02 and E
10. SM 03 01 proposed shall be published by ARTC before the equipment is commissioned Standard Typical Circuits For use in accordance with ARTC specification SDS 25 and standard typical circuits developed and or approved specifically for ACS2000 equipment Date of last revision 18 Dec 09 Page 13 of 14 This document is uncontrolled when printed See ARTC Intranet for latest version Engineering Signals Instruction AR 1S Level Crossing Axle Counter Detection System Design Version 1 0 ESI 03 02 References Data used to compile this Engineering Instruction Frauscher Axle Counter Application Guide D1413 1e 2 1 02 Frauscher System Description D10002 02 1 2 2 7 04 Frauscher Axle Counter Mounting amp Commissioning D1414 2 31 1 02 Frauscher Axle Counter Mounting Instructions for Overvoltage Protection Boards D1653 2e 30 7 04 Frauscher Axle Counter ACS2000 Diagnostics D2167 2 17 11 06 Frauscher Axle Counter Structure of Documents D10002 01 2 1 19 1 05 Parts 1 2 3 4 5 6 7 8 9 10 11 12 WRSA Burgins Rd Level Crossing Request for Approval VLine Burgin s Rd Level Crossing 23 3 07 Provisional Type Approval Railway Group Standard Introduction of Axle Counters Managing the Risk J une98 Railway Group Standard Introduction and use of Axle Counters Managing the Risk Feb03 Railway Group Standard Resetting and Restoration to Service of Signalling Systems J une98 ARTC Engineering Signal
11. ads for approach and island track sections Not ell detelis shown Not to scate 5 Category 2 Notice Board speed contro to level crossing Layout D o Active Level Crossing Protection Till ARTC Sya Sarani ESN Teca Mates Aa Axle Counter Control Counters The approach requirements for all train paths to the level crossing shall be considered Each approach path shall be recorded in the Level Crossing Axle Counter Control Table Additional axle counters and or timing sections may be required to accommodate station stops or other regular train stopping locations Date of last revision 18 Dec 09 Page 6 of 14 Version 1 0 This document is uncontrolled when printed See ARTC Intranet for latest version Engineering Signals Instruction AR 1S Level Crossing Axle Counter Detection System Design 5 1 5 2 5 3 Version 1 0 ESI 03 02 Axle Counter Reset Facilities Background Axle counters are very accurate and very reliable However their failure modes are different from track circuits and they do not automatically reset when the track section is clear They may require a reset from time to time when there is a miscount typically for a high rail vehicle The need for a reset for an equipment failure is very rare but may be required for a power supply failure Axle counters by virtue of their advantages will often be used on lightly used lines and often at remote locations far from Maintenance and Operations staff Mis
12. age 45 Section 5 2 Electromagnetic I nterference Wiring of the entire axle counter system must be designed to prevent electromagnetic spikes that could damage or interfere with the axle counter equipment Care is to be taken in the arrangement of apparatus and wiring to ensure no interference voltages are induced by other systems including High Voltage Impulse AC track circuits J eumont Schneider track equipment electromagnetic relay coils etc Partial Traversing Software specific reset procedure can be implemented for partial traverse for example shunting trains D10002 05 2 1 page 17 section 1 7 5 ACB Types Reset ACB type 014 which has the required Reset configuration and the unidirectional operation is to be used for this application Wiring Safety Considerations Cable connection interfaces must be designed to prevent inadvertent short circuit connection between circuit wires or circuit and shield on the following critical circuits 1 Al1 Fm and A2 P Fm 2 Reset 3 Counting Head Inputs Ref D10002 06 1 2 page 4 section 2 2 Connector Coding All Boards are coded to the backplane Connectors are specific to the ACB boards Ref D10002 07 1 2 page 3 section 4 ACB Maximum Service I nactivity The ACB must operate at least once in every 85 days this requires a switch from clear to occupied track status then occupied to clear or vv Ref D10002 08 1 2 page 4 section 6 Date of last revision 18 Dec 0
13. amp Board letters and background non reflective 2 Axle Counter 2 section arrangoment rake Type f with bet HO Notice Board 3 All axle counters connected to Axle Counting Board ACB in isolated operation HOG Main Line indicator equipment room Not all details shown Not to scale Layout B 20 ad Active Level Crossing Protection HAT ARTC Signal StandarasiARTC ESN Technical NowewLX Ade Axle Counter Control Counters This arrangement may be used for a installation where hi rail vehicles do not take on and take off This is the simplest arrangement and with fewer components is less likely to result in technical miscount errors This layout may be used only where layout A is not suitable Date of last revision 18 Dec 09 Page 4 of 14 Version 1 0 This document is uncontrolled when printed See ARTC Intranet for latest version ESI 03 02 Engineering Signals Instruction Level Crossing Axle Counter Detection System Design Single track plain track environment two axle counter sections with Island Track Circuit Single Track Plain track environment Two Overlapping Axle Counter Sections with Conventional Island Track Circuit Layout C Axle Gountor Reset Box ssing Equipment Hut mined On a site by aie Dasis Notice Board note 1 _ To Country mainline down Notice Board note 1 Up approach Axle Counter Section 2 Notice Board note 1 Down approach Axle Counter Section 1
14. cation for Put on and Take off In all cases staff who may use the level crossing or axle counter sections for Put on and Take off should be instructed in the processes for the Reset of the axle counter section Version 1 0 Date of last revision 18 Dec 09 Page 2 of 14 This document is uncontrolled when printed See ARTC Intranet for latest version ESI 03 02 Engineering Signals Instruction Level Crossing Axle Counter Detection System Design Single track plain track environment three axle counter sections Layout A Preferred Configuration Single Track Plain track environment Three Consecutive Axle Counter Sections Using double usage of heads Layout A Axle Countor Reset Box _ Level Crossing Equipment Hut Position determined on a sie by ade basis Notice Board note 1 _ Noses Board note 1 m mainline down oO lt Notice Board note 1 Notice Board note 1 Down approach Axte Counter Section 1 Up approach Axle Counter Section 2 LEGEND NOTES D LX approach Wheel Sensor 1 Category 2 Notice Board worded Axle Counter white lettering on black background configuration as per SPS 003 Sect 4 6 Indicator Board lottors and background non reflective mts Type f with bea HO Notice Board 2 Axle Counter 3 section arrangement g 3 All axle Counters connected to Axle Counting Board ACB in isolated operation OGO M 7 equipment room RS Saal kiir U
15. cenarios Other ARTC design standards may permit the use of axle counters for purpose other than level crossings Occupied Status Time After the last wheel leaves the track section switching from occupied to clear occurs immediately Double Usage Cables used to handover between evaluation boards should be as short as possible and maximum length of 30m D10002 04 1 2 page 6 section 1 3 1 typically a 500mm moulded network cable straight NOT crossed otherwise damage WILL result Spark suppression on load Adequate measures are to be taken to ensure spark suppression at the load controlled by the opto couplers of the evaluation board D10002 04 1 2 page 6 section 1 3 3 Transmission mode Transmission mode is not approved under this Engineering Instruction Isolation Mode is the only method approved for use due to the difficulty in testing for maintenance purposes and complexity in testing and setting to work procedures Auto Cancelling after Shunting Operations During shunting operations it is the preferred practice is to provide automatic cancellation of the crossing operation by the island track circuit energising after the shunting train clears the crossing track This feature should be retained wherever possible in new designs using axle counter train detection systems If it is proposed not to utilise this arrangement then shunters push buttons must be used Signalling Plan The location of strike in points and a
16. counts will cause the track section to show occupied after the passage of a train or rail vehicle This causes continuous operation of the level crossing warning protection A convenient procedure for resetting is important to reduce the disruption to motorists and disruption to maintainers during an out of course failure response at remote locations Two types of error are encountered on the Frauscher ACS2000 system 1 Serious Error system fault very rare 2 Simple Error miscount or power restart Reset procedure All track sections for the level crossing will be reset using a combination of the serious and simple resets using a single switch operation The reset switch is to be mounted in a special housing secured with an Operator key padlock A 3 position switch sprung to the centre is to be used e Centre is the normal position then to Reset e Turning to the left and holding for minimum 1 second and then e Turning to right and holding for minimum 1 second e Return to Centre termed Normal to complete the operation Each axle counter track section is to be separately indicated using LED s mounted in the housing they indicate Red for Occupied Failed A Green LED shall indicate track section Clear There is a 120sec timer to ensure that upon resetting the axle counters the level crossing protection will continue to operate for a period of 120 seconds There shall be a flashing red LED underneath the reset switch which shal
17. ing time and respective train speed Special requirements for logic for the Axle Counter system shall be detailed in the Control Table Circuit Diagrams Mode Jumper positions are to be detailed on the circuit diagrams DN Jumper positions are to be detailed on the circuit diagrams DIR jumper positions are to be detailed on the circuit diagrams Track clear occupied output device Output relay for vital circuits shall be WRSA QS2 or QN1 type housed in the same Level Crossing equipment enclosure as the ACS2000 system Alternatively direct track occupied track clear can be wired directly into a Microlok II or crossing controller if these devices are used for crossing control Date of last revision 18 Dec 09 Page 9 of 14 This document is uncontrolled when printed See ARTC Intranet for latest version Engineering Signals Instruction AR 1S Level Crossing Axle Counter Detection System Design 6 7 6 8 6 9 6 10 6 11 6 12 6 13 6 14 Version 1 0 ESI 03 02 Block Signalling Track Sections Vital track clear information for a signal interlocking shall be derived independently from ACS2000 equipment Vital outputs from any part of the ACS2000 equipment may only be used to directly control separate Level Crossing protection equipment including adjacent ACS2000 systems and or provide monitoring of the ACS2000 system This Engineering Instruction permits the use of axle counters only in level crossing detection s
18. l indicate that the timer is timing One switch with three sets of contacts is used to reset the three axle counter sections On Site The primary method of resetting will be by manual operation of switches on the exterior wall of the level crossing control equipment enclosure The box housing the switches will be secured with an Operators Key with the OP2 key warding that is captive after unlocking Date of last revision 18 Dec 09 Page 7 of 14 This document is uncontrolled when printed See ARTC Intranet for latest version Engineering Signals Instruction i Level Crossing Axle Counter Detection System Design 5 4 5 5 Version 1 0 ESI 03 02 AXLE COUNTER FAULT RESET Active Level Crossing Protection Axle Counter Control Remote It is ARTC s intention to provide remote reset facilities on all axle counter level crossings at a later date This remote facility will take the form of a data link to either the appropriate train controllers work station control system or to a maintenance terminal at an Engineering office location Dual time separated non vital inputs are to be used to provide security of information with a reset command ARTC requires that the reset controls provided on site are connected to an appropriately placed terminal strip on the equipment rack to allow for future connection of remote equipment at a later time Design to eliminate hi rail resets Axle Counter miscounts can be cau
19. ll axle counter equipment shall be detailed on the Signalling Plan Strike in points and level crossing signs shall also be detailed on the Drivers Diagram The axle counter head position on either the up or down rail is to be specified on the signalling plan Note the counting heads are normally placed on the left hand rail in the normal direction of travel Island Track Circuits Any island track circuits are to be set to be longer than the longest wheelbase of rail vehicles For ARTC this is nominated as island track circuits are not to be less than 26 metres Date of last revision 18 Dec 09 Page 10 of 14 This document is uncontrolled when printed See ARTC Intranet for latest version Engineering Signals Instruction AR 1S Level Crossing Axle Counter Detection System Design 7 7 1 7 2 7 3 7 4 7 5 7 6 Version 1 0 ESI 03 02 Hardware Issues Cables So as to ensure almost interference free signal transmission 7 0 50mm star quad signalling cables are required for single and double usage heads D10002 04 1 2 page 41 is approved for connecting between the axle counter head track side disconnection box GAK to the overvoltage connection board BSI in the equipment enclosure Maximum loop resistance of cable from wheel sensor to evaluation module is At Uo 15VDC 25 ohm At Uo 30VDC 250 ohm The supply current at the wheel sensor is not to drop below 59 mA Check this section against D10002 03 1 2
20. nters are highly reliable for train detection however hi rail road rail vehicles can experience miscounts due to the small wheel profile Designers must take into account the operation of all rail traffic to ensure the reliability of the installed infrastructure This document only relates to the train detection portion of an active level crossing installation other subsystems are covered by separate Engineering Instructions type approvals etc NOTE THE USE OF AXLE COUNTERS ELIMINATES THE CONSEQUENTIAL BENEFIT OF BROKEN RAIL DETECTION AFFORDED BY CONVENTIONAL TRACK CIRCUITS Issued by Date John Furness Manager Standards 07 January 2010 Version 1 0 Date of last revision 18 Dec 09 Page 1 of 14 This document is uncontrolled when printed See ARTC Intranet for latest version Engineering Signals Instruction ARC Level Crossing Axle Counter Detection System Design ESI 03 02 2 Design Guideline The design of an Axle Counter system for an active level crossing installation is to be based on the following information in order of precedence e This Signal Engineering Instruction e ARTC Type Approval Report and conditions ESA 01 0610 020 WRSA GCP4000 e Frausher ACS2000 Application Guidelines document D1413 1le e Frausher ACS2000 User Manual e CAUTIONARY NOTE THIS ENGINEERING INSTRUCTION IS ONLY TO BE USED IN TRAIN ORDER TERRITORY OR DARK TERRITORY I E NON SIGNALLED May be used in other areas by waiver
21. sed by the following hi rail manoeuvres 1 hi rail putting on or taking off at the rail crossing causing a miscount as a result of axles not counting in or out of the section e Layout C is the most reliable hi rail option for these activities as the island track is a conventional track circuit and no miscounts should occur The initial implementation will require that the level crossing is NOT to used for Hi rail take off appropriate signs must be erected 2 hi rail passing entirely through both the crossing approaches e A detection technical miscount in this scenario has the potential not to be identified by the hi rail operator and could cause significant delay to road users The hi rail operator has departed the site and is unlikely to see the crossing continuously operating Date of last revision 18 Dec 09 Page 8 of 14 This document is uncontrolled when printed See ARTC Intranet for latest version Engineering Signals Instruction AR 1S Level Crossing Axle Counter Detection System Design 5 6 6 1 6 2 6 3 6 4 6 5 6 6 Version 1 0 ESI 03 02 Sweep Train Clearing Train In the case of level crossing axle counter track sections it is not necessary to require a sweep clearing train to pass through the section before resets can be performed D10002 05 2 1 page 17 section 1 7 4 Signal Design Considerations Signal or Main Line Indicator MLI At critical road locations it may be appropria
22. te to install one or more signals or indicators on either side of the level crossing The signals indicators can be used to suppress the level crossing warning if an approach section fails due to miscount or other equipment fault Track Vacancy amp Occupancy Output Both Al and A2 relay outputs are to be wired and the two ACB states 0 amp 1 are to be utilised for track occupied track clear control The Al Fm output open and the A2 P output closed is track section occupied The Al Fm output closed and the A2 P output open is track section clear The Al Fm output open and the A2 P output open is axle counter fault and the track section should be set as occupied The Al Fm output closed and the A2 P output closed is axle counter fault and the track section should be set as occupied D10002 05 2 1 page 18 section 1 8 Axle Counter Reset Procedures Administrative operating procedures are being developed that will allow authorised staff to operate the reset facilities Control Tables All the requirements for the Level Crossing axle counter system are to be detailed in the Control Tables Each level crossing shall have its own Control Table on a separate sheet or sheets The Control Table shall detail all the design parameters to be set in the Axle Counter configuration It shall have a separate section for each approach path and for common configuration data The approach distances shall be defined in terms of distances warn
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