At one time ,In canada,we advocated querying the TWR as to where the proceeding flight had 'cleared' the runway..
This was some sort of guide despite the type/weight of the proceeding flt..
There's too much talk of operations on 'Slippery' runways-remember there's no Cert' accountability for slippery only 'poor'coefficient of friction..In Canada that means anything below .3 one is in dragon country(who knows)
