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standards to be followed in the design , application , installation , maintenance and removal of all traffic control devices and all warning devices and barriers which are necessary to protect the public and workmen from hazards within the project limits . The standards established in the aforementioned manual constitute the minimum requirements for normal conditions , and additional traffic control devices warning devices , barriers or other safety devices will be required where unusual , complex or particularly hazardous conditions exist . The above referenced standards were developed using F . H . W.A . , U . S . D . O .T . Manual on Uniform Traffic Control Devices ( MUTCD) . D . TRAFFIC CONTROL DEVICES , WARNING DEVICES AND BARRIERS - MENEENE INSTALLATION : The responsibility for installation and maintenance of adequate traffic control devices , warning devices and barriers , for the protection of the travel in public and workmen , as well as to safeguard the work area in general shall rest with the Contractor. Consideration shall be given to recommendations of the Engineer. The required traffic control devices , warning devices and barriers shall be erected by the Contractor prior to creation of any hazardous condition and in conjunction- with any necessary re-routing of traffic. The Contractor shall . immediately remove , turn or cover any devices or barriers which do not apply to existing conditions . All traffic control devices shall conform to MUTCD standards and shall be clean and relatively undamaged . Damaged devices diminishing legibility and recognition , during either night or day conditions , are not acceptable for use . E . NO WAIVER OF LIABILITY: The Contractor shall conduct his operations in such a manner that no undue hazard will result due to the requirements of this article , and the procedures and policies described therein shall in no way act as a waiver of any of the terms of the liability of the Contractor or his surety . F . Contractor's Maintenance of Traffic Plan shall maintain continuous vehicular traffic on 66th Avenue at all times . The Contractor shall maintain one lane of traffic at all times during 66th Avenue cross drain culvert constructions . The Contractor may elect to close through traffic for a period not to exceed 120 calendar days per roadway during the construction of the following bridges : • 33rd Street Bridge • 370 Street Bridge • 41St Street Bridge • 45th Street Bridge • 49th Street Bridge The Contractor may also elect to close the following roadways at the same time : Alternative 1 Alternative 2 • 33rd Street 37th Street • 41St Street 45th Street • 49th Street 010254 Technical Specifications FAIDublic Works\ENGINEERING DIVISION PROJECTS\0545-66Th Ave SR60 to 57th St (Arcadis)Wdmim\Bid Documents\Technical L. _ w �