Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 1.25
Distraction; Human-Machine Interface; Situational Awareness; Confusion
ATC Issue All Types; Conflict Ground Conflict; Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Air Traffic Control Issued New Clearance; Air Traffic Control Issued Advisory / Alert; Flight Crew Executed Go Around / Missed Approach
Airport; ATC Equipment / Nav Facility / Buildings
Aircraft X was on the RNAV Z approach for Runway 22L. The aircraft had been cleared to land. The approach naturally brings aircraft in on a slight angle to the runway. Aircraft X appeared to be coming in at an angle on short final; but aligned with the runway prior to crossing the threshold. However; an ASDE alert triggered with Taxiway Y; which is parallel to Runway 22L. I instructed the aircraft to go-around. The aircraft went around and later landed without incident.This approach is likely to be problematic in the future because the angle it brings in aircraft on lines up with Taxiway Y until the last minute. It might be best this approach not be used if it can be avoided.
MDW Tower Controller reported an unsafe situation when an aircraft lined up with a taxiway instead of the runway.  Controller reported this approach is likely to be problematic because the angle it brings in aircraft on; lines up with Taxiway Y; until the last minute.