Specifications include, but are not limited to: 1. Furnish signs that are of the size and type shown in the contract documents and use retroreflective sheeting meeting the requirements of Article 4186.03. 2. For Interstate and Primary projects, furnish diamond shaped warning signs that are 48 inches by 48 inches unless specified otherwise in the contract documents. 3. For traffic control zones in duration for 4 calendar days or more, mount signs on fixed posts. 4. Signs for traffic control zones in duration for less than 4 calendar days may be mounted on moveable skids or fixed posts. 5. Meet the following requirements for fixed post mounted signs: a. Sign sheeting applied to rigid wood or metal. b. Mounted at a height of at least 7 feet, measured from the bottom of the sign to the near edge of the pavement. A secondary sign on the same post may be mounted 1 foot lower than specified above. c. A clear distance 2 feet behind a curb or beyond the edge of the shoulder. 6. Meet the following requirements for moveable skid mounted signs: a. Flexible roll-up sheeting or other skid mounted sign systems that meet NCHRP 350 or MASH requirements. b. Mounted at a height of at least 1 foot above the roadway. 7. Ensure mounting devices are not so substantial as to be a hazard to vehicles. Meet the following requirements for posts mounted in existing soil: a. Wood sign supports meeting the materials requirements of Article 4164.04. b. 3.0 pounds per foot U-shaped rail steel posts. c. 2 1/4 or 2 1/2 inch square 12 gage perforated steel tubing. 8. Dual-post and triple-post configurations using these sign supports are acceptable provided that no more than two posts occupy any 8 foot wide path. Bracing of these posts will not be permitted. Posts exceeding these requirements shall have breakaway features approved by the Engineer. 9. Ensure signs are in a condition so they are effective for the intended purposes when viewed from a vehicle. For nighttime installations, ensure the reflectance is adequate so that the message is clearly readable. Ensure signs are maintained in a near vertical position. 10. When indicated in the contract documents, use supplemental sign flags in conjunction with work zone signing. Use sign flags 16 inches square and sheeted with red Type XI retroreflective sheeting meeting requirements of Article 4186.03. 11. On projects where two new lanes are being constructed adjacent to an existing two lane highway, place TWO WAY TRAFFIC (W6-3) signs. Place them off the right shoulder of mainline: 1) after each public side road for each direction of travel for traffic that may enter from all intersecting side roads; or 2) at 1/2 mile intervals, whichever is less. Install these signs when grading activities start and leave in place until the entire four lane divided highway is opened to traffic. If the pavement is constructed under a separate contract, leave these signs in place after the grading contract is completed. They become the property of the Contracting Authority. The paving contractor then takes over these signs and removes them when the four lane divided highway is opened to traffic. Payment will be according to Article 2528.05, A. 12. When directed by the Engineer, cover or remove permanent signing that conveys a message contrary to the message of the temporary signing and not applicable to the working conditions. When the work is completed uncover or replace permanent signing. Permanent signs damaged by the Contractor’s activities shall be replaced at no charge to the Contracting Authority. 13. The END ROAD WORK (G20-2) sign may be eliminated for mobile or short duration (less than 1 hour) temporary traffic control zones. 14. When milled or scarified surfaces exist, sign approaches to scarified areas using ROUGH ROAD (W8-8) signs. Place signs at least 250 feet in advance of milled or scarified areas. Repeat signs for traffic that may enter within the scarified area from intersecting public roads. At locations where milled or scarified areas end at project limits, bridges, or end of day’s work; place BUMP (W8-1) signs within 50 feet in advance of each location. Erect, move, and maintain these signs until milled or scarified areas have been covered with new HMA or PCC pavement.
