A CRJ700 FO REPORTS THE LEX COMMERCIAL ARPT DESCRIPTION IS INACCURATE; TXWY A7 HAS NO SIGNAGE; THERE ARE NO RWY 22 DISTANCE REMAINING SIGNS; AND A KNOWN HOT SPOT IS NOT IDENTIFIED.

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THE DISPATCH RELEASE FOR OUR FLT INDICATED RWY 22 LNDG DATA FOR INTXN TXWY A5. I POINTED OUT TO THE CAPT AND BY PHONE TO OUR DISPATCHER THE TXWY A5 INTXN ON THE ARPT DIAGRAM. THE DISPATCHER AGREED TXWY A5 NEWLY DEPICTED DIDN'T AGREE WITH THE DATA PROVIDED. THE DISPATCHER MENTIONED HE 'DIDN'T HAVE' THE NEW REVISION ARPT DIAGRAM FOR RWYS AT LEX. WE LANDED AT LEX WITHOUT INCIDENT. UPON DEPARTURE FROM LEX; THE CAPT AND I NOTICED THE TAXI DIAGRAM ON THE NEW ARPT DIAGRAM WAS GROSSLY INACCURATE. THE RWY LENGTH ON THE RELEASE (FULL LENGTH TEMPORARY DATA) WAS 6603 FT; 6453 FT FROM RWY 22 TO TXWY A5 (NOT CORRECT). TXWY A7 WAS LISTED AS THE FULL LENTH TXWY ON THE ARPT DIAGRAM SHOWING 7003 FT FOR RWY 22. THERE WERE NO SIGNS INDICATING TXWY A7. GND GAVE INSTRUCTIONS ONLY TO TAXI TO RWY 22; NO MENTION WAS MADE OF TXWY A7. LEX ATIS DID MENTION TXWY A CLOSED N OF RWY 26; HOWEVER; ON THE CURRENT ARPT DIAGRAM; THERE WAS NO TXWY A N OF RWY 26. FULL LENGTH TKOF FROM RWY 22 REQUIRES A 300 TO 400 FT BACK TAXI FROM THE TXWY LABELED TXWY A7 ON THE CURRENT DIAGRAM. WE TOOK OFF FROM INTXN TXWY A7 WHICH APPARENTLY GAVE US 6453 FT TO TAKEOFF. WE USED NORMAL THRUST AND ROTATED WITH APPROX 1/3 OF THE RWY REMAINING (RWY DISTANCE REMAINING SIGNS WERE COVERED UP -- NOT NOTAMED ON OUR DEP RELEASE FROM LEX). TALKED TO A CHIEF PLT AND HE SAID HE WOULD CALL DISPATCH. TALKED TO AN FO REP (LEFT MESSAGE). BOTTOM LINE: NOBODY HAS ACCURATE ARPT DEPICTION; SIGNAGE IS NON EXISTENT AND TEMP DATA IS SUSPECT.CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT THERE IS NO TXWY SIGN INDICATING ENTRY ONTO TXWY A7. TAXI CLRNC TO RWY 22 DOES NOT INCLUDE INSTRUCTIONS TO RWY 22 VIA TXWY A AND TXWY A7. HOWEVER; THE ARPT ATIS STATED 'TXWY A CLOSED N OF RWY 26' BUT IT DID NOT SAY THAT ANOTHER TXWY; A7; IS BEING USED TO RWY 22 AFTER CROSSING RWY 26. ADDITIONALLY; THE RPTR STATED THAT WHEN HOLDING SHORT OF RWY 22 ON TXWY A7; ADDITIONAL RWY AND STOPWAY ARE AVAILABLE TO THE ACFT'S RIGHT. THE RPTR IS THEREFORE UNSURE WHAT THE ACTUAL AVAILABLE RWY 22 LENGTH IS. HE DOES NOT BELIEVE THE 7003 FT IS ACCURATE AND THAT THE ACTUAL FIGURE MAY BE AROUND 6700 FT BUT HE IS NOT SURE. AN ADDITIONAL ITEM WAS HIGHLIGHTED: THERE IS A KNOWN HOT SPOT IDENTIFIED ON TXWY A AT RWY 26. THE HOT SPOT IS DISCUSSED BUT NEVER ADDED TO THE ARPT DIAGRAM. THE RPTR ALSO STATED THAT THE RWY DISTANCE REMAINING SIGNS ON RWY 22 HAVE BEEN COVERED AND PLTS NEVER KNOW IF THEY ARE MEETING PERFORMANCE REQUIREMENTS OR NOT. THIS IS ESPECIALLY A PROB AT NIGHT.