DEV FROM CLRNC. ACR CREW TAXIES PAST THEIR TURN POINT AND HAS TO BE PUSHED BACK FROM A DEAD-END TXWY.

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INADVERTENT TAXI ONTO A DEAD-END TXWY; REQUIRING US TO BE TUGGED BACKWARDS BY GND PERSONNEL. A VERY SHORT TAXI INVOLVING 2 90 DEG TURNS IMMEDIATELY FOLLOWING THE PREVIOUS TURN. BY THE TIME I WAS ROLLING OUT OF THE FIRST TURN; MY VISION WAS FOCUSED DOWN THE TXWY FOR REF AND MISSED THE TURN 90 DEGS TO MY R. DEAD-END TXWY NOT MARKED VERY WELL; OTHER THAN 2 SMALL DEAD-END SIGNS ALMOST INVISIBLE FROM A B-757 COCKPIT. DUSK WAS A FACTOR AS THE DEAD-END TXWY AHEAD LOOKED NORMAL. NO HARM DONE; OTHER THAN THE INCONVENIENCE OF NEEDING TO BE PUSHED BACK. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATES THAT THE TURN FROM THE RAMP AREA (G4) ONTO TXWY G IS FAIRLY TIGHT FOR A B-757-200 AND THE TURN FROM TXWY G ON TO TXWY H IS EVEN MORE DRASTIC (THOUGH IT IS A WIDER AREA) BECAUSE IT IS MORE THAN 90 DEGS. THE VISUAL PRESENTATION AS ONE COMPLETES THE FIRST TURN (FROM RAMP AREA G-4 TO TXWY G) IS THAT YOU SHOULD TAXI STRAIGHT AHEAD A BIT. THIS IS MISLEADING; INSTEAD YOU MUST MAKE AN IMMEDIATE HARD R TURN. THERE ARE 2 SMALL SIGNS (ABOUT AUTOMOBILE LEVEL) THAT ARE VERY DIFFICULT TO SEE AT DUSK (MAYBE UNLIGHTED; BUT HE IS NOT SURE. HE DID NOT SEE ANY LIGHTS DURING THIS EXCURSION). THE TXWY ALSO NARROWS IF ONE MISSES THE TURN TO TXWY H.