The Table of Contents for this section is available.
(A) General:
Reflective sheeting used for signs shall be Type I engineer grade (enclosed lens) sheeting or better which meets the requirements of Section 1093. The reflective sheeting shall cover the entire sign face. The reflective sheeting shall be applied in a workmanlike manner so that there are no bubbles or wrinkles in the material. The sign backing shall be constructed of a rigid material such as plywood, aluminum, or fiberglass.
(B) Material Certification:
The Contractor shall furnish a Type 3 Material Certification in accordance with Article 1063 for all new reflective sheeting and a Type 7 Material Certification for all used reflective sheeting. Certification shall be supplied prior to use.
(C) Approval:
All materials shall be subject to the approval of the Engineer.
(A) General:
Barricades shall be constructed out of wood, ultra violet resistant plastic, or fiberglass.
Barricade rails shall have a smooth face and shall have alternating orange and white retroreflective stripes that slope at an angle of 45 degrees.
(B) Supports:
Barricade rails shall be supported in a manner that will allow them to be seen by the motorist and provide a stable support not easily blown over by the wind or traffic.
The barricade support shall be constructed of lightweight materials and shall not have rigid sway bracing for "A" frame design.
(C) Reflective Sheeting:
Reflective sheeting shall be either Type I engineer grade (enclosed lens), Type III high intensity (encapsulated lens) or Type IV high intensity (microprismatic) which meets the requirements of Section 1093. The reflective sheeting shall be applied with a pressure sensitive adhesive and shall be used on all barricade rail facing.
The sheeting on each rail of any individual barricade shall be of the same color.
(D) Material Certification:
The Contractor shall furnish a Type 3 Material Certification in accordance with Article 1063 for all new barricades and a Type 7 Material Certification for all used barricades. Certifications shall be provided prior to use.
(E) Approval:
All materials shall be subject to the approval of the Engineer.
(A) General:
The cones shall be made of ultra violet stabilized plastic impact resistant material meeting the requirements of the MUTCD and this article. Orange shall be the predominant color on cones.
The cones shall be conical in shape and shall have a minimum height of 28" or 36" and minimum base dimension of 14 1/2" as shown in the plans. The 28" and 36" cones (excluding ballast) shall have a minimum weight of 7 pounds and 10 pounds respectively. When in an upright position the cones shall display the same dimensions regardless of their orientation to oncoming traffic.
(B) Ballast:
When properly ballasted, the cones shall be wind resistant and not blow over under normal roadway conditions, including high speed truck traffic in close proximity to the cones. When struck, the cones shall not permanently distort to a degree which would prevent reuse.
Ballasting of the cones shall be achieved by using any of the following methods:
1. Cones with bases that may be filled with ballast,
2. Doubling the cones or using heavier weighted cones,
3. Cones with special weighted bases, or weights such as sand bag rings that can be dropped over the cones and onto the base to provide increased stability.
Seventy percent of the weight of the cone shall be in the base. These added weights shall not present a hazard if the devices are inadvertently struck.
(C) Retroflective Collars:
Where cones are used for channelization at night, each cone shall have white reflective collars as shown on the plans. Reflective sheeting for these collars shall be Type III high intensity (encapsulated lens), Type IV high intensity (microprismatic), or Type VI flexible vinyl high intensity (encapsulated lens) retroreflective sheeting which meets the requirements of Section 1093. The retroreflective sheeting shall be used on the entire collar face.
(D) Material Certification:
The Contractor shall furnish a Type 3 Material Certification in accordance with Article 1063 for all new cones and cone collars and a Type 7 Material Certification for all used cones and retroreflective collars. Certification shall be supplied prior to use.
(E) Approval:
All materials shall be subject to the approval of the Engineer.
(A) General:
Drums shall be composed of a body, reflective stripes, and ballast.
(B) Body:
The body of the drum shall be made of orange, impact resistant, ultra-violet plastic material capable of maintaining its integrity upon impact throughout a temperature range of 20F. to 125F. When struck, the drum shall not permanently distort to a degree which would prevent reuse, nor roll excessively after impact. The drum shall be designed to prevent water from accumulating and freezing in the top or bottom.
The body of the drum shall be cylindrical in shape with the following dimensions; a minimum height of 36 inches, a minimum top outer diameter of 18 inches, a bottom outer diameter of 21 to 24 inches, and a weight of 12 to 15 pounds. The top outer diameter shall not exceed the bottom outside diameter. Drums shall have closed tops to prevent accumulation of debris.
When the sandbag ballasting method is used; the body of the drum shall be of a two-piece, breakaway design, composed of a main body and a detachable plastic base designed to accommodate a 50 pound sandbag. Upon impact the main body of the drum shall deform and become detached from the base, allowing vehicles to easily pass over the remaining base and ballast.
(C) Reflective Stripes:
A minimum of two orange and two white alternating horizontal circumferential stripes shall be provided with each drum. Each stripe shall be a six to eight inch wide band of Type I Engineer Grade (enclosed lens), Type III high intensity (encapsulated lens) or Type IV high intensity (microprismatic) retroreflective sheeting which meets the requirements of Section 1093. Any non-reflective spaces between orange and white stripes shall not exceed two inches. Stripes shall not be placed over any protruding corrugation areas. Stacking and unstacking the drums shall not cause damage to the reflective sheeting.
(D) Ballast:
Drums shall be ballasted using either the sandbag ballast method or the tire sidewall ballast method. When properly ballasted, the drums shall be wind resistant to the extent of withstanding wind created by traffic under normal roadway conditions, including high speed truck traffic in close proximity to the drums. Ballast shall not be placed on top of the drum.
(1) Sandbag Ballast Method
A sandbag with 50 pounds of sand shall be supplied with each drum. The sandbag shall be placed inside the body on top of the detachable base.
(2) Tire Sidewall Ballast Method
The base of the drums shall be designed to accommodate a maximum of two tire sidewalls that when combined will have a minimum weight of thirty pounds and a maximum weight of fifty pounds. Upon impact the main body of the drum shall deform and become detached from the tire sidewalls, allowing vehicles to easily pass over the tire sidewall ballasts.
(E) Material Certification:
The Contractor shall furnish a Type 2 Certification in accordance with Article 1063 for all new drums and a Type 7 Material Certification for all used drums. Certification shall be supplied prior to use.
(F) Approval:
All materials shall be subject to the approval of the Engineer.
(A) General:
Flashing arrow panels shall meet the requirements of the MUTCD.
All exterior metal surfaces shall be finished with Federal yellow or orange enamel per Federal Standard 595a color chip ID# 13538 or 12473 respectively.
(B) Material Certification:
The Contractor shall furnish a Type 3 certification for new flashing arrow panels in accordance with Article 1063 and a Type 7 Material Certification for all used flashing arrow panels. Certification shall be supplied prior to use.
(C) Approval:
All materials shall be subject to the approval of the Engineer.
1089-6 CHANGEABLE MESSAGE SIGNS.
(A) General:
The changeable message signs may be either bulb matrix or flip-disc matrix type.
The complete sign unit shall be totally mobile and capable of being located as traffic conditions demand.
All exterior metal surfaces of the trailer shall be finished with Federal yellow or orange enamel per Federal Standard 595a Color Chip ID # 13538 or 12473 respectively except for the sign face assembly which shall be flat black.
All components of the sign unit shall be rated to operate at temperatures ranging from -30 degrees F. to 165 degrees F.
The changeable message sign shall not be affected by mobile radio transmissions or adverse weather conditions.
(B) Power Source:
The complete system shall be designed for stand alone operation with no outside power sources required, but shall also be capable of operating from an external power source (120/240 volts three-wire single phase). Generator, fuel tank, batteries and electronic controls shall be located in protective housings which are to be provided with locks to restrict access.
(C) Panel Support:
The panel shall be mounted to the trailer via vertical posts. The vertical posts shall be designed to support a 100 MPH wind load with the sign fully extended. Devices for raising and lowering the sign shall be automated hydraulic or electrical with a manual backup. The minimum height from the ground to the bottom of the sign, in the raised position shall be seven feet. The sign panel shall be designed to be positioned for both operation and travel, and shall have a positive locking device for each position. Stabilizing and leveling devices shall be screw type with a self-leveling foot and shall be mounted on the trailer to support the unit in the operating position when not attached to a vehicle. These devices shall stabilize the unit in a horizontal position when located on slopes 6:1 or flatter.
(D) Control Systems:
The operator's control console shall consist of a keyboard; a display which duplicates the sign display: switches to control generator start and stop, sign message selection, message flash rate; event time clock; and keyboard authorization key switch.
Messages shall be generated through the keyboard. The keyboard shall enable the user to generate an infinite number of messages.
An electronic automatic dimming device shall be provided which senses ambient light conditions and automatically dims the brightness of lamps/turns on the black lights. A manual dimmer switch shall be provided to override the automatic dimming device.
(E) Message Sign Panel:
The message sign panel must be designed so that the message is displayed and visible without interruption during the time that the equipment is operational. The sign panel shall provide for three (3) lines of programmable legend. The message displayed on the sign shall be visible from 1/2 mile and legible at a distance of 1/4 mile. Each line of the sign shall be covered by a polycarbonate lens. The polycarbonate lens shall not decrease daytime visibility of the sign.
The flash rate shall be adjusted by the sign operator so that a minimum of three complete messages can be displayed and legible to a driver while approaching the sign at the posted speed.
Characters shall be composed of a minimum 4 bulb or flip-disc x 7 bulb or flip-disc matrix font except for the letter "I" and number "1". The character height shall be a minimum of 17" with an effective stroke with of 2". Each line of the sign shall be capable of displaying a minimum of eight characters. Messages shall be automatically centered and proportionally spaced on each line.
The complete sign message shall be formed by sequentially displaying up to six prestored message phrases composed of a minimum of three message lines each. Sign messages shall be entered into memory via a keyboard entry system located at the sign and by selection of pre-stored messages already in the permanent sign memory.
Each changeable message sign shall have in memory, when delivered, all the pre-programmed messages shown below.
MAX SAFE SPEED 25 MPH MAX SAFE SPEED 30 MPH
STOP AHEAD YIELD AHEAD
MAX SAFE SPEED 35 MPH MAX SAFE SPEED 40 MPH
MAX SAFE SPEED 45 MPH MAX SAFE SPEED 50 MPH
ONE LANE BRIDGE SURVEY CREW
MAX SAFE SPEED 55 MPH DETOUR AHEAD
CAUTION DETOUR AHEAD LANE CLOSED AHEAD
RIGHT LANE CLOSED LEFT LANE CLOSED
CENTER LANE CLOSED SINGLE LANE AHEAD
MERGE LEFT MERGE RIGHT
KEEP LEFT KEEP RIGHT
PASS LEFT PASS RIGHT
USE LEFT LANE USE RIGHT LANE
MERGE AHEAD ROAD MACHINES AHEAD
ROAD WORK AHEAD FLAGGER AHEAD
BUMP DIP
STOP AHEAD YIELD AHEAD
BE PREPARED TO STOP SIGNAL AHEAD
SIGNAL NOT WORKING DO NOT PASS
ONE LANE BRIDGE SURVEY CREW
SHOULDER WORK SOFT SHOULDER
PAVEMENT ENDS LANE ENDS
ROAD CLOSED 1/4 MILE ROAD CLOSED 1/2 MILE
ALL TRAFFIC EXIT LEFT ALL TRAFFIC EXIT RIGHT
ROAD NARROWS ROAD CLOSED AHEAD
RAMP CLOSED REDUCE SPEED
ROAD PAVING AHEAD ALL TRAFFIC MUST STOP
SLOW MOVING TRAFFIC NIGHT WORK AHEAD
CAUTION FLAGGER AHEAD RUNAWAY TRUCK RAMP
MEDIAN WORK AHEAD
LEFT LANE NARROWS RIGHT LANE NARROWS
* TEST PATTERN A **TEST PATTERN B
* Test Pattern A is 1/2 of the lamps/flip-discs on at a time
** Test Pattern B is for the remaining 1/2 of the lamps/flip-discs on at a time.
(F) Memory:
The sign shall be capable of storing a minimum of ninety-nine (99) user generated messages.
(G) Material Certification:
The Contractor shall furnish a Type 3 Certification in accordance with Article 1063 for all new changeable message signs and a Type 7 Material Certification for all used changeable message signs. Certification shall be supplied prior to use.
(H) Approval:
All systems used on projects shall meet the requirements of this specification and shall be approved by the Engineer before they are operated on the job site.
1089-7 TEMPORARY CRASH CUSHIONS.
(A) General:
The impact resistance of the crash cushion shall be such that no less than 85 percent of the length of the unit is utilized for decelerating and stopping vehicles weighing 4,500 pounds when impacted head-on at the design speed shown in the plans. The temporary crash cushion shall provide average head-on deceleration rates of less than 7 G's. The temporary crash cushion shall be so designed that any vehicle weighing 4500 pounds when impacting at any point along the side at angles up to 20 degrees as measured from the longitudinal centerline, will be redirected with an exit angle not to exceed 10 degrees. The unit shall remain intact after a side impact, and without maintenance, be capable of sustaining additional side or head-on impacts.
The temporary crash cushion debris resulting from impact shall be contained within the structure of the temporary crash cushion.
The temporary crash cushion package shall include rear transition panels to connect the back of the temporary crash cushion to rigid or flexible barrier systems.
(B) Reflective End Treatments:
All temporary crash cushions shall have a yellow nose wrap which shall visually match the color chip that corresponds to the Federal Standard No. 595a for Yellow (Color No. 13538).
The reflective end treatment shall meet the requirement for reflectivity in Article 10881.
(C) Material Certification:
The Contractor shall furnish a Type 3 Certification in accordance with Article 1063 for all new temporary crash cushions and a Type 7 Material Certification for all used temporary crash cushions. Certification shall be supplied prior to use.
(D) Approval
Before beginning installation of the crash cushion, the Contractor shall furnish to the Engineer detailed brochures, specifications, and other manufacturer's data which completely describe the crash cushion, including performance criteria and installation drawings and instructions.
All materials shall be subject to the approval of the Engineer.
1089-8 TRUCK MOUNTED IMPACT ATTENUATORS.
(A) General:
The truck mounted impact attenuator shall consist of the following 4 basic components:
1. A crushable cartridge encased in a shell.
2. A backup.
3. A backup support assembly for attaching the backup to the truck.
4. A truck with a gross vehicle tare weight between 18,000 and 24,000 pounds for stationary operations and between 18,000 and 35,000 pounds for moving operations. A two axle flat bed type truck with minimum gross vehicle tare weight of 5,000 pounds may be ballasted as follows; with sections of portable concrete barrier attached to the bed of the truck with bolts or straps, or concrete poured into the bed of the truck and attached to the truck with bolts, or a continuous layer of asphalt placed in the bed of the truck and attached to the truck with bolts.
The impact attenuator shall be mounted on a truck chassis to provide a uniform clearance of 11 to 13 inches between the bottom of the shell and the roadway. The steel backup support assembly shall be of sufficient size and strength to permit mounting on the chassis by means of brackets.
The truck mounted impact attenuator cartridge shall have a standard trailer lighting system, including brake lights, tail lights, and turn signals.
(B) Crash Tests:
Impact attenuators used for stationary operations and moving operation shall meet the design criteria shown below. The impact attenuator shall be so designed that when impacted head-on by a vehicle weighing from 1,800 to 4,500 pounds or when impacted at a 1015 degree angle by a vehicle weighing 4,500 pounds the flail space velocity on impact (velocity of passenger at time of impact) shall be less than 40 ft/sec. and the 10 millisecond average ride down deceleration shall be less than 20 G's.
Certified test data for the truck-mounted impact attenuator shall show complete conformance to all requirements of tests 50, 52 and 54 at the corresponding design speed as set forth in the National Cooperative Highway Research Program Report 230. Certification of test results shall be by a representative of the agency performing the tests.
(C) Other Tests:
The truck mounted impact attenuator shall pass the following accelerated endurance tests:
1. Vibration:
All vibration tests shall be conducted with a complete cartridge.
The truck mounted impact attenuator shall be subjected to 80 hours of continuous vibration (40 hours in the horizontal position and 40 hours in the vertical position) with a frequency of 5-8 Hz and minimum amplitude of 0.60 inches input at the backup base, without any damage.
2. Moisture:
The top and bottom of the cartridge shall be subjected to 24 hours of simulated rain at 6 inches per hour. The test shall result in no water accumulation or moisture absorption by the material contained in the cartridge and no deterioration in the performance of the truck mounted impact attenuator.
3. Corrosion:
When subject to 2 periods of 24 hour exposure and 1 hour drying time each of salt spray (fog), in accordance with ASTM B117-73 method of salt spray (fog) testing, the energy absorbing material shall show no signs of corrosion or decrease in energy absorbing capacity of material.
Each repair package shall include a truck mounted attenuator cartridge and spare hardware to repair a system after it has been impacted. (See Standard Special Provisions)
(D) Reflective End Treatment:
The reflective end treatment shall meet the requirements of Article 10881.
(E) Material Certification:
The Contractor shall furnish a Type 3 Certification in accordance with Article 1063 for all new truck mounted impact attenuators and a Type 7 Material Certification for all used truck mounted impact attenuators. Certification shall be supplied prior to use.
(F) Approval:
Before beginning installation of the impact attenuator, the Contractor shall furnish to the Engineer the speed at which the impact attenuator was crash tested as specified in Article (B).
All materials shall be subject to the approval of the Engineer.
(A) General:
The flags shall be orange or fluorescent versions of orange. Each flag shall be 16 inches square or larger, and attached to a staff which is mounted to the traffic control device it is supplementing.
(B) Flag Material:
(1) Fabric Type Flags
Fabric type flags shall be made of an orange or fluorescent orange flexible type of material such as vinyl or nylon.
(2) Panel Type Flags
Panel type flags shall be made of either 0.063 inch aluminum, wood, or fiberglass which is to serve as a backing for an orange or fluorescent orange reflective sheeting.
(C) Reflective Sheeting:
Reflective sheeting used for the panel type flags shall meet the requirements for Type I Engineers Grade reflective sheeting. Reflective sheeting shall meet the requirements of Section 1093.
(D) Material Certification:
The Contractor shall furnish a Type 3 Certification in accordance with Article 1063 for all warning flags. Certification shall be supplied prior to use.
(E) Approval:
All materials shall be subject to the approval of the Engineer.
(A) General:
Warning lights shall be in accordance with the requirements of the MUTCD and the Institute of Traffic Engineers Purchase Specification for Flashing and Steady-Burn Warning Lights, included in the Equipment and Material Standards-Publication No. ST 017.
Warning lights shall be lightweight and portable.
(B) Lamp and Enclosure Lens:
Warning lights shall be lens directed, enclosed lights, that emit a yellow light.
(C) Visibility:
Type A warning lights shall be maintained so as to be visible on a clear night from a distance of 3,000 feet. Type B warning lights shall be maintained so as to be visible on a sunny day, when viewed without the sun directly over or behind the device from a distance of 1,000 feet. The effective intensity shall be greater or equal to 35.0 candelas for the first 168 hours of continuous use.
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| Lens Directional Faces | ||
| Flash Rate per minute | ||
| Flash Duration 1 | ||
| Min. Effective
Intensity 2 (Candelas) | ||
| Minimum Beam Candle Power | ||
| Hours of Operation |
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1 Length of time that instantaneous intensity is equal to or greater than effective intensity.
2 These values must be maintained within a solid angle 9 degrees on each side of the vertical axis and 5 degrees above and 5 degrees below the horizontal axis.
(D) Power:
All warning lights shall be battery powered or solar powered. Batteries shall be contained in a case designed to contain a battery. The battery case shall be made of a high density polyethylene plastic material. Where the battery case is mounted on the ground a steel case may be used. Type A warning lights shall be provided with a photoelectric cell.
(E) Material Certification:
The Contractor shall furnish a Type 3 Certification in accordance with Article 1063 for all new warning lights and a Type 7 Material Certification for all used warning lights. Certification shall be supplied prior to use.
(F) Approval:
All materials are subject to the approval of the Engineer.
(A) Reflective Sheeting:
The reflective sheeting shall have a smooth, sealed outer surface which will display the same color both day and night. All materials shall be subject to the approval of the Engineer. The reflective sheeting shall cover the entire sign face. Reflective sheeting shall meet the requirements of Section 1093.
(B) Material Certification:
The Contractor shall furnish a Type 3 Certification in accordance with Sections 1063 for all new reflective sheeting used on flagger paddles and a Type 7 Material Certification for all used sheeting. Certification shall be provided prior to use.
1089-12 WORK ZONE ASPHALT ISLAND.
(A) General:
The work zone asphalt island shall be constructed of Type I1, Type I2 or HDS asphalt concrete surface course in accordance with Section 645.
(B) Tubular Markers.
Tubular markers shall be installed on top of the work zone asphalt island. Each device shall have appropriate white reflective collars as shown on the plans. Retroreflective sheeting for these collars shall be Type III high intensity (encapsulated lens), Type IV high intensity (prismatic), or Type VI flexible vinyl high intensity (encapsulated lens) retroreflective sheeting which meets the requirements of Section 1093.
(C) Paint Requirements:
The work zone asphalt island shall be painted yellow throughout its entire surface area.
The requirements for the pavement marking paint (yellow) on the work zone asphalt island shall meet the requirements of Section 1087.
(D) Approval:
All materials shall be subject to the approval of the Engineer.