Rev. 7-1-95

SIGNAL BULB REPLACEMENT, AERIAL INSPECTION, AND LOOP REPLACEMENT

805-T-085

BULB REPLACEMENT AND AERIAL INSPECTION. This work shall consist of replacing traffic signal bulbs, aerial inspection, and making minor repairs to traffic signals and flashers at the locations shown on the plans. Minor work shall include aligning signal heads and signs. These repairs may be performed at the same time as the bulb replacements.

Signalized intersections included in other contracts and agreements will not be included in the bulb replacement and inspections portion of this work. A listing of the locations which will require bulb replacement and aerial inspection is shown on the plans. This work shall be performed between _____________, 19____ and ______________, 19____.

Lenses for each type of signal indication shall be washed on both the inside and outside with an approved cleaning solution. The reflector shall be washed with the same solution. Both lens and reflector shall be wiped dry with no smears or residue remaining on the surfaces.

Bulbs shall be installed such that the filament of the bulb appears to be in the shape of a U. This adjustment shall be made by means of rotating the socket.

Lenses which are semi-opaque, cracked, or include holes shall be replaced.

Visors or louvers which are missing or damaged shall be replaced. The District Traffic Engineer shall be contacted for availability of replacement visors.

Wires shall not be closed in doors. Sockets shall not be tightened into terminal strips. Bulbs shall not be overtightened or undertightened.

Aligning of signal heads will not be permitted unless the appropriate set screw, nut, bolt, or screw is also tightened.

A tool appropriate for tightening shall be used for aligning signal heads, replacing lenses, replacing visors, or making adjustments.

LOOP REPLACEMENT. The Contractor will be provided plans for loop replacement at the preconstruction conference. Such loops shall be operational after tests are performed by Department signal technicians before ____________, 19____.

TRAFFIC CONTROL SETUPS. The traffic control setups shown on the plans will be required.

MATERIALS. No materials or forms other than those specified herein will be provided by the Department.

Material records in accordance with 106.01 will not be required since some materials will be supplied by the Department. Other materials are anticipated to be relatively small in quantity or acquired over the counter in bulk purchases. The Contractor shall still use quality materials which shall be in accordance with the specifications and normally accepted industry standards. Materials may be checked by the Department and will be rejected if determined to be unsatisfactory.

SCHEDULE OF OPERATIONS. The Contractor shall notify the Engineer at least five work days prior to starting both bulb replacement and loop replacement operations.

The Contractor shall notify the Engineer daily of the intended locations of work.

The work day shall consist of eight consecutive hours between 7:00 a.m. and 5:30 p.m. A work week shall consist of 40 hours on Monday through Friday. Work outside of these hours will be permitted only when directed.

Interruptions to traffic flow will not be permitted after noon on the day before a holiday to noon on the day following the holiday.

DEPARTMENTAL RIGHTS. The Department will reserve the right to enter a signalized intersection included in this work, or a controller cabinet for the purpose of inspections, modifications, or maintenance.

If the Department awards a separate contract to modernize, modify, rebuild, or remove a signal installation included in this work, the Department will reserve the right to delete all or part of such work to be performed on this contract.

MAINTENANCE OF TRAFFIC. If the established speed limit is above 45 mi/h, signs and flashing arrow signs will be required as shown on the plans.

Maintenance of traffic shall be in accordance with 801. Traffic control layout sheets on the plans show minimum guidelines for situations which may occur. If unusual working conditions occur, the Contractor shall provide the Engineer a proposal for the traffic control measures to be used, subject to approval.

If the Contractor finds it necessary to temporarily occupy a part of a shoulder or the traveled width of pavement and restrict traffic, the Contractor shall provide all barricades, lights, flaggers, and other protection of traffic as may be deemed necessary by the Engineer and as specified in 801.

Construction warning lights shall be in accordance with the applicable requirements of 801.12, except that type II barricades, plastic drums, or construction warning signs used only for maintaining traffic during daylight hours will not require a type B low intensity flashing warning light.

When barricades, plastic drums, or other channelization devices are used to divert traffic, the length of the taper L shall be determined by means of the formulas as follows:

For a speed limit of 40 mi/hr or less:

L = S x S x W x 0.3048
60 ---

(L = S x S x W
60)

 

For a speed limit of 45 mi/hr or greater:

L = S x W x 0.3048

(L = S x W)

Where L = Length of the taper, m (ft).

S = Speed limit, mi/hr.

W = Lateral distance traffic is being moved, ft.

When these devices are used to close a travel lane, the spacing, in meters, of these devices shall be the same as the numerical value of the speed limit times 0.3048. (The spacing in feet will be the same as the numerical value of the speed limit.) When used to define the presence of a vehicle or workers temporarily occupying the traveled way, without lane closure, these devices shall be appropriately spaced to clearly outline the work area and prevent vehicles from entering the work area. A 1.25 m x 1.25 m (48 in. x 48 in.) "Workers Ahead" sign shall be placed just off the shoulder 210 to 240 m (700 to 800 ft) ahead of each operation. The signs shall be removed from view when no work operations are being conducted. Traffic control requirements not addressed herein shall be as shown on the plans. Extended work shall consist of work which takes place on the roadway for over 30 minutes. Short term repair activity and short term repair work shall consist of work which takes place for 30 minutes or less.

If a work activity involves frequent moving of the work setup, such that no work setup is in place for more than 30 minutes, the Engineer may require that the work being performed at an intersection, or series of intersections, be treated as an extended work zone.

When aerial work is being performed which occupies a portion of the traveled way, a minimum of one flagger will be required. The plans may show that two flaggers will be required.

All equipment which is used on or near a traveled way shall be equipped with revolving amber warning lights. These warning lights shall be a minimum of 200 mm 8 in.) in diameter. Such lights shall be clearly visible to approaching vehicles through all phases of the equipment operation for a minimum distance of 150 m (500 ft). Strobe warning lights may be used provided that they output 2 000 000 cd (2,000,000 candlepower) during daylight hours and 1 000 000 cd (1,000,000 candlepower) during other hours.

Identification placards shall be affixed to all equipment so that police agencies and Department personnel may identify the Contractor.

The longitudinal spacing of multiple construction signs, where required, shall be 150 m (500 ft). This distance may require adjustment based upon location conditions. All variations shall be subject to approval.

Specific traffic control requirements may arise as a result of malfunctioning traffic signals. A signal may go into flash mode during replacement of signal bulbs. The Contractor shall provide traffic control, reset conflict monitors, replace fuses, and reset circuit breakers as necessary. These conditions shall also be shown on the aerial inspection reports and on the maintenance card found in the controller cabinet.

The traffic signal shall be kept cycling while lanes are closed. The Contractor shall provide a vehicle simulator in the form of a circular loop of No. 6 wire, 2440 mm (8 feet) in circumference, placed over the loop detector. If the loop is too insensitive to call the phase, the procedure as outlined below shall be used.

If the work zone occupies the detected area of an approach, the technician may temporarily place the associated phases on recall as required to accommodate reasonable traffic flow. The intersections shall be returned to their original recall settings upon completion of work. These maintenance activities shall be shown on the maintenance card found in the controller cabinet.

DOCUMENTATION REQUIREMENTS. The traffic signal maintenance card found in each cabinet shall be signed by the technician in charge of the bulb replacement operations or loop sealing operation. This record shall include the date, military time, initials and the comment Rebulb, Loop Replacement, or Aerial Inspection.

The Rebulb and Aerial Inspection report is shown on the plans. This report shall be used to document the work performed. Copies of this form will not be provided.

WORK SUMMARY. The Contractor shall provide a summary of the work performed each month. The reports for each month shall be provided not later than the 15th day of the following month.

The Engineer will then recommend full or partial payment. The work summary shall be an itemized listing of the date and time for intersections where work was performed and the quantity of each activity.

The work shall include the Aerial Inspection and Annual Rebulb Checklist shown on the plans for those intersections where either or both of these activities were performed.

The requirements for renegotiated price for quantities in 104.02 and 109.03 will apply. However, the Contractor will not be paid a renegotiated price for pay items for which the quantities used would normally be considered an excessive overrun or excessive underrun.

SIGNAL BULB WATTAGES. The following table shall be used as a guideline for proper bulb wattages.

200 mm (8 in.) Green, 200 mm (8 in.) Amber,
230 mm (9 in.) Walk/Don't Walk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 67 W
200 mm (8 in.) Red, 200 mm (8 in.) Amber Arrow,
200 mm (8 in.) Green Arrow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .116 W
300 mm (12 in.) Energy Saving Grid Walk/Don't Walk. . . . . . . . . . . . . . . . . . . . . .67 W
300 mm (12 in.) Green, 300 mm (12 in.) Amber,
other size Walk/Don't Walk. . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . .. . 116 W
300 mm (12 in.) Red, 300 mm (12 in.) Amber Arrow,
300 mm (12 in.) Green Arrow . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . ..150 W
Optically Programmable Bulbs, All Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .150 W
Cabinet Convenience Bulb; G, M, or P-1 Cabinets . . . . . . . . . . . . . . . . . . . . . . . .. .67 W

BULB REQUIREMENTS. The Contractor shall provide all bulbs except for programmable bulbs. All bulbs which are provided by the Contractor shall be in accordance with 913.15.

PROGRAMMABLE BULBS. These bulbs will be provided by the Department. These bulbs shall be replaced in the same manner as all other bulbs. Quantities for programmable bulbs will be as shown in the Itemized Proposal.

BULB REPLACEMENT CHECKLIST. The following information shall be shown in the appropriate space on the form shown in Appendix B on the plans.

(a) Date of bulb changeout

(b) Initials of technician responsible for bulb changeout

(c) All corrections to the plan bulb quantities

(d) Height of lowest head per intersection on cable span systems only

(e) Indication of whether removing a bulb at an intersection caused the signal to go into conflict

(f) Indication of whether there is evidence of moisture intrusion into the signal heads

(g) Indication if visors, louvers, lenses, reflectors, or balance adjusters were replaced

(h) Indication if wiring problems exist, such as burned connections, drip loops missing, or insulation missing or damaged

(i) Indication if quick disconnect housings still have Jones plugs which have not been removed

(j) Indication that bulbs have been installed so that the filament of the bulb appears to be in the shape of a U

METHOD OF MEASUREMENT. Aerial inspection and bulb replacement, loop resealing, lens replacement, and visor replacement will be measured by the number of units replaced or resealed.

BASIS OF PAYMENT. Aerial inspection and bulb replacement will be paid for at the contract unit price per each for aerial inspection and annual rebulb, signal, or aerial inspection and annual rebulb, flasher as the case may be. Loop resealing will be paid for at the contract unit price per each for loop, reseal. Lens replacement will be paid for at the contract unit price per each for lens replacement for the type of signal and diameter of lens shown in the Schedule of Pay Items. Visor replacement will be paid for at the contract unit price per each for visor replacement for the type of signal shown in the Schedule of Pay Items.

Payment will be made under:

 

Pay Item Pay Unit

 

Aerial Inspection and Annual Rebulb, Flasher . . . . . . . . . . . . . . . . . . . . . EACH
Aerial Inspection and Annual Rebulb, Signal . . . . . . . . . . . . . . . . . . . . . . EACH
Lens Replacement, Pedestrian Signal, _______ mm . . . . . . . . . . . . . . . . . EACH
------------------------------------------diameter
(Lens Replacement, Pedestrian Signal, _______ in . . . . . . . . . . . . . . . . . .EACH)
-----------------------------------------diameter
Lens Replacement, Traffic Signal, _______ mm . . . . . . . . . . . . . . . . . .. . EACH
-----------------------------------------diameter
(Lens Replacement, Traffic Signal, _______ in. . . . . . . . . . . . . . . . . . . . . .EACH)
-----------------------------------------diameter
Loop, Reseal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .EACH
Visor Replacement, Pedestrian Signal . . . . . . . . . . . . . . . . . . . . . . . . . . .. .EACH
Visor Replacement, Traffic Signal . . . . . . . . . . . . . . . . . . . . . . . . . . .. .. . . EACH

 

The costs of travel time to and from an intersection and traffic control setups and devices shall be included in the costs of the pay items. The cost of installation of programmable bulbs shall be included in the cost of annual inspection and rebulb.