Narrative:

Aircraft X turned direct to aco after marrs on the departure route instead of proceeding east to sphre then turning southeast to aco. Aircraft X had to be stopped at FL210 and turned east to prevent an error or midair collision from happening with aircraft Y at FL220. Aircraft Y was swbound from alb to ict. Aircraft X told me he was cleared ACO2 departure maars direct aco direct flo (his destination). Det controller claims aircraft X was cleared det ACO2 aco flo (which is what the strip said). This is the second time within less than 6 months that I have personally had an aircraft make a wrong turn on the aco departure and come into conflict with another aircraft. The marrs aco departure route has been an on going problem since its inception.

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Original NASA ASRS Text

Title: ZOB CONTROLLER DESCRIBED CONFLICT NEAR FL210 WHEN DEPARTURE AIRCRAFT TURNED DIRECT ACO AFTER MAARS; CONTRARY TO SID ROUTING; REQUIRING CONTROLLER INTERVENTION TO MAINTAIN SEPARATION; CONTROLLER ALLEGING MULTIPLE OCCURRENCES.

Narrative: ACFT X TURNED DIRECT TO ACO AFTER MARRS ON THE DEP RTE INSTEAD OF PROCEEDING E TO SPHRE THEN TURNING SE TO ACO. ACFT X HAD TO BE STOPPED AT FL210 AND TURNED E TO PREVENT AN ERROR OR MIDAIR COLLISION FROM HAPPENING WITH ACFT Y AT FL220. ACFT Y WAS SWBOUND FROM ALB TO ICT. ACFT X TOLD ME HE WAS CLRED ACO2 DEP MAARS DIRECT ACO DIRECT FLO (HIS DEST). DET CTLR CLAIMS ACFT X WAS CLRED DET ACO2 ACO FLO (WHICH IS WHAT THE STRIP SAID). THIS IS THE SECOND TIME WITHIN LESS THAN 6 MONTHS THAT I HAVE PERSONALLY HAD AN ACFT MAKE A WRONG TURN ON THE ACO DEP AND COME INTO CONFLICT WITH ANOTHER ACFT. THE MARRS ACO DEP RTE HAS BEEN AN ON GOING PROB SINCE ITS INCEPTION.

Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.