smooth flat tread with sipping or a walnut shell impregrnated tire will help a bit but not solve traction problem issues when traveling empty on a oil soaked wet concrete floor (most weight is on the rear tires) or turning issues when handling a near capacity load (most of the weight is on the driving tires). Water & oil is slicker than newly frozen ice - close to zero coefficent of friction.
Maybe they need a floor scrubber.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.