A CARJ CREW; TAXIING FOR TAKEOFF AT SJC; INCURRED RWY 30R WITHOUT A CLRNC.

Narrative

WE PUSHED FROM THE GATE AT XA45 PST. WE REQUESTED TAXI INSTRUCTIONS AT APPROX XA49. AS WE WERE GIVEN TAXI INSTRUCTIONS THE GND CREW WAS GIVING ME THE ALL CLR SIGNAL. I REVERIFIED WITH MY FO AND HE SAID RWY 30L. WE HAD A MINDSET RWY 30L; BECAUSE WHEN WE FLEW IN THE NIGHT BEFORE RWY 30R WAS CLOSED AND WHEN WE HAD DEP THAT MORNING IT WAS STILL CLOSED. ALSO WHEN WE LANDED INFORMED THERE WERE ACFT DEPARTING AHEAD OF US ON RWY 30L. ALSO WHEN WE WERE INBOUND MY FO WHO WAS ON HIS FIRST TRIP SINCE TRAINING FOLLOWING A 5 MONTH FURLOUGH INADVERTENTLY HAD MISSED THAT RWY 30R WAS OPEN FOR DEP ONLY. HE LATER SAID HE HAD MISSED THIS BECAUSE OF TRYING TO COPY ALL OF THE TXWY CLOSURES ON THE SJC ATIS. TO WEATHERING THIS PROB WAS IN THE 11 TIMES IN THE PREVIOUS 6 WKS THAT I HAD EVER FLOWN INTO SJC; RWY 30R-12L HAD BEEN CLOSED. WE TAXIED OUT AND ACCOMPLISHED THE BEFORE TAKEOFF CHKLIST. AS WE APCHED THE END OF RWY 30R WE SAW NO FLASHING YELLOW LIGHTS WARNING US OF AN ACTIVE RWY. WE SAW AN ACFT ABOUT 5 MILES OUT FOR RWY 30L. I TOLD MY FIRST OFFICER TO CALL THE TOWER AS WE TAXIED ACROSS RWY 30R. WE DID NOT KNOW THE TWR HAD TRIED CALLING US TO CLR US FOR DEP ON RWY 30R; WE CALLED THE TWR FOR THE L AND HENCE THE INCURSION HAD OCCURRED. WE WERE WRONG; BUT UPON TALKING TO THE TWR SUPVR THIS HAS OCCURRED 7 TIMES SINCE 01/WED /02 MAKING THIS A SERIOUS CONCERN FOR ALL! I AM NOT SURE WHAT CAN BE DONE; BUT WE MUST MAKE SURE TO TRY TO STOP FURTHER EVENTS AT SJC.