A B737-800 CAPT; WHILE TAXIING AT BWI; HAS RWY INCURSION ON RWY 28 AT TXWY E.

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PREVIOUS DAY WAS LONG WITH LOTS OF WX RESULTING IN LATE ARR. EARLY GET UP NEXT MORNING AT XA00 BODY TIME. PRIOR TO TAXI; ATIS HAD RWY 28 CLOSED AND DEP 33L; SO MY MINDSET WAS RTE TO RWY 33L. AT TAXI; GND GAVE US TAXI RWY 28 WHICH WOULD TAKE US TO TXWY E WITH L TURN ON TXWY P. AS I APPROACHED P; I'M STILL THINKING ABOUT RWY 33L RTE; WENT STRAIGHT AHEAD; TAKING ME TO TXWY P/RWY 28 INTXN. EVEN THOUGH; I WAS THINKING OF RWY 33L RTE; I KNEW I WAS GOING TO RWY 28. THE INTERSECTION I THOUGHT I WAS AT WAS THE TXWY P/RWY 22 INTXN. THIS WAS CONFIRMED IN MY MIND BY ANOTHER ACFT THAT WAS IN REALITY ABOUT TO TAXI ON RWY 28 BUT IN MY MIND LOOKED AS IF HE WAS AT TXWY BRAVO XING RWY 22. THE SPATIAL RELATIONSHIP LOOKED CORRECT. AS I CROSSED HOLD LINE AT TXWY E/RWY 28; GND TOLD ME TO STOP. WE WERE PAST THE HOLD LINE BUT SHORT OF RWY 28. GND INSTRUCTED US TO TAXI CLR; GAVE US INSTRUCTIONS TO RWY 28 AND REMAINDER OF FLT UNEVENTFUL. IN HINDSIGHT; WE OBVIOUSLY NEED TO DO BETTER AT MONITORING OUR POS ON THE GND. AT THE TIME I THOUGHT WE WERE DOING IT RIGHT. SOME ARPTS; BY THEIR DESIGN AND OP; ARE TRAPS WAITING TO BE SPRUNG. AT ARPTS SUCH AS BWI WHERE THERE ARE MULTIPLE INTXNS OF TXWYS AND RWYS; SPECIFIC CLRNC SHOULD BE GIVEN TO CROSS EACH RWY. OTHERWISE TRY AS WE MIGHT; MISTAKES ARE GOING TO BE MADE.