DA50 CREW HAD A RWY INCURSION AT TEB.

Narrative

TAXI INSTRUCTIONS WERE TO TAXI TO RWY 24; HOLD SHORT OF RWY 19. ACFT WAS PROCEEDING FROM RAMP AREA OF THE FBO (HANGAR AREA) ADJACENT TO RWY 19. HOLD SHORT LINE FOR RWY 19 IS WELL BACK FROM THE RWY CLOSE TO THE RAMP AREA WHERE THE ACFT WAS PARKED. AS THE PNF; I HAD MY EYES IN AND OUT OF THE COCKPIT DOING CHKLISTS AND LOOKING FOR TFC ON THE TXWYS AND RAMP. ACFT WAS BROUGHT TO A STOP ON A TXWY SHORT OF THE APCH END OF RWY 19. GND QUERIED IF WE WERE THE ACFT SITTING ON RWY 19; WHICH WE DENIED; GND THEN CLRED US ACROSS RWY 19 TO THE HOLDING PAD FOR RWY 24. AS TAXI WAS INITIATED; I LOOKED BACK OVER MY SHOULDER TO SEE THE HOLD SHORT LINE BEHIND THE ACFT. CAPT STATED THAT HE HAD NOT SEEN THE HOLD SHORT LINE. CONSTRUCTION IN THE VICINITY OF THE HOLD SHORT LINE MAY HAVE CONTRIBUTED TO AN 'OVERLOAD OF VISUAL INFO' AND CONTRIBUTED TO HIS FAILURE TO NOTE THE LOCATION OF THE LINE. MY ATTN WAS FOCUSED ON ENSURING THE CHKLISTS WERE COMPLETED AND I HAD FAILED TO NOTE THE PROX OF THE HOLD SHORT LINE TO OUR PARKING LOCATION. THIS CAPT IS ALWAYS IN A RUSH LEAVING HIS FO SCRAMBLING TO KEEP UP. MY PRIORITIES WHILE TAXIING NEED TO BE FOCUSED MORE ON THE ACFT'S LOCATION AND MOVEMENT; AND LESS ON THE CHKLIST -- EVEN WHILE THE OTHER PLT IS CTLING THE ACFT.