Traffic_Signal_Routine_Maintenance_Tasks.pdf

Tuolumne County Department of Public Works Traffic Signal Maintenance (2026-2027) Contract No. 1792, Invitation for Bids

EXHIBIT D

TRAFFIC SIGNAL ROUTINE MAINENANCE TASKS

The Contractor will be required to provide routine maintenance for the traffic signal equipment as listed in this IFB. The Contractor will be required to furnish and use a maintenance checklist form approved by the County and City for each inspection. The Contractor will be required to maintain a copy of the maintenance checklist in the traffic signal controller cabinet, and to maintain a copy of the maintenance checklist at the Contractor’s office of record.

The Contractor will be required to follow a program of continuing comprehensive routine maintenance designed to eliminate or reduce the incidence of malfunctions, reduce complaints, and extend the useful life of the equipment. The program shall include, but not be restricted to, the following:

QUARTERLY ROUTINE MAINTENANCE PROGRAM

The quarterly routine maintenance program shall consist of the following tasks:

1. Traffic Signal Controller

• Visually inspect for proper operation

• Verify controller display working

• Verify proper timing and coordination

• Verify all phases on recall

• Visually inspect all relays, photocells, cabinet fans, and switches and make routine adjustments

2. Controller Cabinet

• Check ground fault receptacle

• Check general appearance

• Inspect door gasket condition

• Inspect door lock operation

• Operate and inspect ventilation fan and cabinet light (where applicable)

• Inspect for pests

3. Detectors and Loops

• Visually inspect for exposed wires, cracks, and/or pot holes and recommend repairs or replacement as needed

• Check and tune detector amplifiers

4. Traffic Signal & Pedestrian Heads

• Visually inspect all vehicular and pedestrian signals for proper operation and replace outages

• Check overall intersection operation

• Check that all pedestrian signals are in good condition and aimed properly

• Check all audible and tactile pedestrian signal are in good condition and properly positioned (where applicable)

5. Pedestrian Push Buttons

• Visually inspect and note condition

• Actuate each button for proper operation

6. Emergency Vehicle Pre-Emption

• Visually inspect cables, antenna, and other hardware

7. Battery Backup Battery Backup System (BBS) (where applicable)

• Test battery charge

8. Miscellaneous

• Check PG&E meter seal

• Inspect pull box lids

• Visually inspect mast arms, signal housings, and other signal hardware

• Ensure that hand hole covers are present & secure

• Inspect pull boxes

• Inspect condition of splices

• Clear all lids of debris

• Remove any easily removable, unauthorized signs, stickers, and posters and notify the

Engineer of any graffiti existing on poles or equipment

9. Night Inspections

• Inspect traffic signal heads

• Inspect pedestrian signal heads

• Inspect luminaires

SEMI-ANNUAL ROUTINE MAINTENANCE PROGRAM

The semi-annual routine maintenance program shall consist of the following tasks:

1. Controller Cabinet

• Check that each plug-in component fits tightly and securely

• Visually inspect ventilation filter and recommend replacement as needed

• Check wire schematics and records to make sure they are in the cabinet

• Measure voltage level at service entrance in cabinet and record

• Vacuum and clean controller cabinet and contents

• Inspect terminal blocks

• Report significant areas of rust on cabinet exterior and signal poles to Engineer

2. Traffic Signal & Pedestrian Heads

• Visually check integrity of splices

• Visually check for wear and function on electromechanical controllers

• Check overall intersection operation

• If visual inspection warrants, clean and polish signal lenses and reflectors, lenses, and align signal head as needed

• Check the mounting of each signal head and adjust/tighten the mounting as required

3. Emergency Vehicle Pre-Emption

• Actuate preempt to check operation with Emergency Vehicle Pre-Emption Emitter and recommend repairs as needed

• Check mounting of each signal head and adjust/tighten the mounting as required

4. Battery Backup System (BBS) (where applicable)

• Test BBS

• Test battery charge and report if replacement is needed

• Measure voltage level at service entrance in cabinet and record

• Vacuum and clean BBS controller and cabinet

5. Miscellaneous

• Furnish updated inventory list

ANNUAL ROUTINE MAINTENANCE PROGRAM

The annual preventative maintenance program will consist of the following tasks:

1. Controller Cabinet

• Lubricate hinges and lock when necessary

• Replace cabinet air filter

• Check and replace (if necessary) weatherproof gasket seal

• Check cabinet grounding

• Verify service connections are secure

2. Signal System Assessment

• Check load switches

• Perform conflict monitor test and submit printout to County

• Check relays

• Check for water accumulation and duct sealant

• Check all connectors

• Clean and polish all lenses and reflectors

• Perform LED intensity evaluation for output compliance and replace LEDs as necessary

• Replace up to 10 bent visors and backplates per year as necessary

• Paint up to 10 signal and pedestrian heads per year as necessary

• Perform integrity test on all hardwire interconnect lines

• Inspect and align antennas for remote monitoring

3. Miscellaneous

• Ensure cabinet anchor bolts are tightened

• Check any other equipment utilized during the term of the agreement but not specifically listed

• Adjust all mast arm mounted street name signs as needed

• Check condition of paint (frameworks, heads, cabinet, poles, and other appurtenances) and make recommendations for repainting as needed