AN EMB145 FLC HAS A RWY INCURSION DURING A HVY SNOW FALL CONDITION WHEN XING THE HOLD SHORT LINE AT CLE; OH.

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ON JAN/XA/00 ON OUR TAXI; BOTH THE FO AND I EXPERIENCED MAJOR CONFUSION ON OUR ASSIGNED TAXI RTE. THIS MISUNDERSTANDING LED TO OUR ACFT ACCIDENTALLY XING THE HOLD SHORT POINT ON THE RWY. SEVERAL FACTORS WERE INVOLVED IN THIS EVENT THAT LED TO THE OCCURRENCE. THE WX WAS MARGINAL AT THE ARPT WITH BLOWING SNOW WHICH REDUCED VISIBILITY. PRIOR SNOW SHOWERS AT THE ARPT OBSCURED TXWY AND RWY MARKINGS AND SIGNS. DUE TO SNOW REMOVAL OPS AT THE ARPT; AN UNUSUAL AND NONSTANDARD TAXI RTE TO THE ACTIVE RWY WAS IN USE. AS THE FLC; WE FEEL WE HAVE LEARNED GREATLY FROM THIS EXPERIENCE AND MAY HAVE ADDRESSED SOME ISSUES FOR FUTURE REF WHICH MIGHT HAVE STOPPED THE SIT BEFORE IT HAD OCCURRED. IF THE GND CTL HAS TO ISSUE A NONSTANDARD TAXI RTE AND INSTRUCTIONS; IT WOULD BE BENEFICIAL TO HAVE A PRIOR NOTIFICATION OF THE OUTLINE OF THE NEW PROPOSED RTE -- POSSIBLY A NOTICE ON ATIS OF THE EXPECTED TAXI RTE TO BE GIVEN PRIOR TO TAXI TO ALLOW THE CREW TIME TO REVIEW IT AND BRIEF THEIR ACTIONS. MOST IMPORTANTLY; ANY TIME A HOLD SHORT INSTRUCTION IS TO BE GIVEN; MAKE IT AS SHORT AND SIMPLE AS POSSIBLE WITH NO EXTRA INFO INCLUDED WITH THE CLRNC. INFORMING ACFT OF MAKING TURNS ON TXWYS; OR EXPECTED RWYS FOR TKOF SHOULD BE DROPPED AND MORE CLR EMPHASIS PLACED ON JUST HOLDING SHORT. ALSO; IN POOR LIGHT; REDUCED VISIBILITY CONDITIONS; OR OTHER TXWY/RWY OBSCURING CONDITIONS; ALWAYS USE PLAINLY MARKED INTXNS AND RTES. CONFUSING AND TEDIOUS TAXI RTES WITH POOR SURFACE CONDITIONS THAT TAKE PLACE NEXT TO ACTIVE RWYS ARE GOING TO CAUSE PROBS. TAXI INSTRUCTIONS THAT ARE NOT THE STANDARD RTE; BUT ARE BEING IMPLEMENTED SHOULD STAY CONSISTENT TO ALL ACFT AS MUCH AS POSSIBLE. WHEN ISSUING THE HOLD SHORT INSTRUCTION; KEEP THE POINT CONSISTENT TO ALL ACFT USING THAT INTXN.