Specifications include, but are not limited to: 1. All tractors shall have rear and side mounted, P.T.O. or hydraulic driven flail mowers. Each mower shall be equipped with the leveling roller or wheel attachment and be capable up to 80" cut. All mowers shall be equipped with R.O.P.S., with overhead revolving lights and other safety equipment required by M.O.S.H.A. There shall be a minimum of two tractor mowers per cutting. 2. Cutting knives shall be kept sharp at all times to ensure clean cut grass and a good final appearance. 3. The Administration reserves the right to discontinue use of mowers at anytime and the Engineer will be the sole judge as to whether the mowers are performing satisfactorily. 4. The Contractor shall place and remove signs as required, as the work progresses. In addition, the Contractor shall obtain warning signs and stands with the message "Mowers Ahead." The signs shall be placed as shown in the Maryland Book of Standards.