AN MD80 TAXIES FOR TKOF AT LAX; ONLY TO FIND THE FLC HAD CROSSED SOME HOLD SHORT LINES THAT WERE NOT MARKED BY ANY SIGNS; NOR WERE THERE ANY PUBS THAT HAD THEM MARKED.

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LAX HAS 2 SETS OF HOLD LINES FOR RWY 24L&R. HOWEVER; THE FIRST SET IS NOT THE USUALLY SOLID WITH DASHED LINES. THEY ARE JUST DASHED LINES WITH NO MARKING TO LET YOU KNOW TO STOP THERE. THERE WAS NO TFC IN FRONT OF US AND WE WERE UNAWARE OF THE LAX FIRST HOLD LINE. TWR HAD NOT ASKED US TO HOLD THERE. WE WERE BOTH UNFAMILIAR WITH THESE HOLD LINES. TWR INFORMED US THAT WE HAD CROSSED THE HOLD LINE AND WE REPLIED THAT WE HAD NOT; BUT WE WERE LOOKING AT APPARENTLY THE SECOND SET OF LINES. ANOTHER TWR CTLR CAME ON AND DID NOT SAY ANYTHING ABOUT IT AND CLRED US FOR TKOF. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT THEY NEVER SAW ANY USUAL HOLD SHORT LINES. THEY SAW A DASHED LINE ONLY. THEY EXPECTED TO SEE A SOLID LINE NEXT TO SOME DASHED LINES. THE FLC WERE UNABLE TO CLARIFY EXACTLY WHERE THE LINES WERE LOCATED. THE FLC WOULD LIKE TO SEE SOMETHING TO MARK BETTER WHERE THE HOLD SHORT LINES ARE LOCATED. THEY DON'T APPEAR ON ANY ARPT CHARTS OR OTHER TAXI PAGES. OTHER CTLR NEVER CLARIFIED THE EXACT LOCATION. THEY WERE ATTEMPTING TO HOLD SHORT OF RWY 24L AT THE TIME OF INCURSION.