The Contractor shall furnish up to two (2) crews consisting of one (1) supervisor, two (2) flaggers, and a vehicle for each crew. Vehicles used within the work area shall be in proper working order, equipped with approved flashing amber light bar not less than 20 inches long, having passed an annual State inspection, and deemed acceptable for highway use. The need for additional flaggers will be determined by the Engineer prior to beginning work at any location and will be paid for as Supplemental Flagging. The Contractor shall furnish three (3) two-way radios. The Contractor shall maintain the radios and have them available on the job at all times. Radios shall provide clear communication. The Department will furnish and install all signs, cones, barrels, barricades and stop/slow paddles required for the traffic control operation.