Introduction
Plan preventive maintenance using the equipment instructions, site conditions and authority’s policy. Define responsibilities, inspection intervals, fault reporting and corrective action. Review the program using actual maintenance records; do not treat a generic schedule as a guarantee of longer life, fewer crashes or lower cost.
Routine visual checks: frequency and scope set by the approved maintenance plan.
- Verify each indication during the approved test sequence and check for failed lamps; do not illuminate conflicting indications simultaneously for this check.
- Verify the approved conflict-prevention logic and displayed indications for all relevant approaches
- No visibly damaged signal head, pole or cabinet
- No conflicting indications within the same signal head
A drive-by check can identify some visible problems, but it does not replace the scheduled detailed, electrical and structural inspections.
Monthly checks: define the scope and duration in the approved maintenance plan rather than assuming every inspection takes 15 minutes.
- Cabinet door secure, locks functional
- Cabinet interior clean, no water or vermin
- No unusual noise from the cabinet fan
- Check detector response on each approach using the approved test method, qualified personnel and the required traffic-management measures.
- Pedestrian push buttons responsive
Detailed checks: schedule scope and duration under the approved maintenance plan.
- Visual condition check: compare the indication with a known-good unit only as a preliminary observation. Confirm required light intensity using the specified optical measurement method; visual comparison alone is not a photometric compliance test.
- Conflict monitor test (per the pre-printed test sheet)
- Surge arrestor visual inspection
- Earth rod resistance check
- Battery state of charge (solar systems)
- Cleaning of cabinet filter
- Cleaning of signal head lenses
- Have qualified personnel inspect terminal tightness using the approved isolation procedure and specified torque; do not indiscriminately retighten live or undamaged connections.
Scheduled checks: agree the interval and work duration for each intersection
- Document the required conflict-monitor tests and acceptance results
- Record the lamp-hour counter, if available, and assess LED-module replacement against the manufacturer’s maintenance criteria and measured performance.
- Qualified personnel should test the earthing system using the approved method and retain the required report.
- Foundation crack survey
- Pole and signal head structural inspection
- Detector calibration (re-tune video/radar detection)
- Communication system test (central system)
- Update of as-built drawings with any changes
- Spare parts inventory check
- Plan replacement with compatible spare modules using the approved maintenance criteria, operating history and measured condition.
Ask GAOQIAO which maintenance documentation and spare-parts options are available for the selected equipment and network size.
Featured Products
GAOQIAO supplies spare LED modules, conflict monitors and maintenance checklist templates.
Conclusion
A documented preventive maintenance program can help identify defects and organise corrective work. Define inspection tasks, intervals, records and escalation using the equipment instructions and authority’s requirements. Ask GAOQIAO to confirm available spare parts or support for the installed models. Do not assume a fixed defect-detection percentage or a standard maintenance package.
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Frequently Asked Questions
How often should the conflict monitor be tested?
Set the inspection interval from authority requirements, equipment condition and intersection criticality.
What is the typical annual maintenance cost per intersection?
Estimate annual maintenance from the actual equipment, labour, access arrangements and inspection plan; obtain a project-specific budget.
Can GAOQIAO provide remote monitoring?
Ask GAOQIAO whether optional 4G remote monitoring is available for the selected system and which battery-voltage, load-status and alarm data it provides. Verify the communication protocol and integration requirements with the proposed SCADA system before claiming compatibility.
Relevant GAOQIAO products
These public GAOQIAO catalogue pages are related to the guide. Open them for the representative description, then confirm the latest drawing and configuration before ordering.
- Traffic signal controllersWired and solar controllers with 6, 22, 44 and 56 output options.
- LED traffic signal heads200mm, 300mm and 400mm signal heads; confirm the selected model and applicable project requirements.
- Signal polesVertical, signal arm and double-arm poles; confirm suitability for the approved site design.
- Spare parts and accessoriesSpare LED modules, lenses, visors, surge arrestors and anchor bolts.