DAY CTLR CONCERNED WITH DAY ARPT SNOW REMOVAL VEHICLE RESTRS.

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I WAS WORKING THE GND AND LCL CTL POS IN THE DAYTON; OH; ATC TWR. SNOW REMOVAL OPS WERE ONGOING WITH SNOW AND FREEZING RAIN. RWY 6L WAS THE ACTIVE RWY AND THE ILS RWY 6L THE ONLY APCH AVAILABLE. BRAKING ACTION ON THE TXWYS WAS NIL. BRAKING ACTION ON THE RWY WAS POOR; DETERIORATING RAPIDLY TO NIL. WHEN SNOW REMOVAL IS IN PROGRESS; THE CITY DOES NOT CLOSE THE RWY. WE (ATC) WORK THE EQUIP ON AND OFF THE RWY BTWN ARRS AND DEPS. AT ONE POINT; I HAD 5 DIFFERENT GROUPS OF VEHICLES ON THE RWY. EACH GROUP WITH A DIFFERENT CALL SIGN. I HAD TO MAKE 5 DIFFERENT CALLS TO CLR THE VEHICLES OFF THE RWY AND 5 CALLS TO VERIFY CLR OF THE RWY. THIS IS A DANGEROUS AND UNSAFE CONDITION. THE RWY BRAKING ACTION IS DETERIORATING AS SNOW REMOVAL CANNOT TAKE PLACE WITH ACFT OPERATING ON THE RWY. I HAVE TO REMEMBER WHERE ALL THE TRUCKS ARE WHILE CONTINUING AIR OPS. THE ANSWER SEEMS SIMPLE. CLOSE THE RWY (MAYBE 20-30 MINS). CLR THE SNOW AND ICE; THEN REOPEN FOR OPS. IN MY 15 YRS EXPERIENCE AT DAYTON; THIS IS HOW IT HAS ALWAYS BEEN. I'M TIRED AND FRUSTRATED TO BE PLACED IN THIS SIT. WE ARE SACRIFICING THE SAFETY OF THE FLYING PUBLIC; PLTS; AND SNOW REMOVAL EQUIP OPERATORS.