MLG TAXIING STOPS SHORT OF RWY AT HOLD LINE. BELIEVED HE WAS ON TXWY; NOT ENTERING RWY.

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DURING TAXI FROM 'A' CONCOURSE TO RWY 5R AT CLE; FO; WHILE ATTEMPTING TO ASSIST ME IN FINDING THE WAY; STATED THAT I TAKE TXWY W TO TXWY L FOR RWY 5R. I DID SO AND AS I SAW THE HOLD LINE PASS UNDER MY WINDOW; I STOPPED. SIMULTANEOUSLY THE SUPER-ALERT GND CTLR CALLED US TO 'STOP!' NO TRANSGRESSION OCCURRED BUT IT WAS CLOSE. DUE TO MY RELATIVE UNFAMILIARITY WITH THE CLE LAYOUT; I WAS TAXIING SLOWLY; SO STOPPING WAS NO PROB. SUGGESTION: IF THERE WAS A RWY SIGN BY WHISKEY; I (AND THE FO) CERTAINLY MISSED IT. IF THERE IS NO SIGN; WE CERTAINLY NEED ONE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THAT HE CHKED THE ARPT DIAGRAM HIMSELF; THEN RELIED ON THE FO TO GIVE GUIDANCE. THIS WAS A NIGHT OP AND AS FAR AS HE KNOWS THERE WAS NO LIGHTED SIGN INDICATING THE RWY AHEAD. HE IS GRATEFUL HE SAW THE HOLD LINE AND FOR THE VIGILANCE OF THE GND CTLR. RPTR FEELING IS THAT THE CTLR WAS WATCHING BECAUSE THIS IS NOT THE FIRST TIME FOR THIS OCCURRENCE. INDEED THAT IS RPTR CONCERN; IF HE DID IT THEN SOMEONE ELSE COULD ALSO TAXI TOWARD THE RWY. CTLR ASKED IF HE COULD MAKE A 180 DEG TURN WITHOUT BREACHING THE RWY ITSELF; WHICH WAS DONE. RPTR STATES THAT HE IS ACCUSTOMED TO MORE SPECIFIC SIGNAGE INDICATIONS AND WAS WATCHING FOR SUCH SIGNS. IN RAIN OR SNOW OPS THIS WOULD EASILY HAPPEN AGAIN. THIS IS A BROAD PAVED AREA AND CAN BE CONFUSING.