An aircraft was instructed to hold short of a runway. The aircraft disregarded the instruction and e...

Narrative:

Traffic volume was beginning to slow after a departure and arrival push with weather to the west of the airport. I had two IFR departures left to depart with two aircraft on final. Local control 2 had landed a aircraft X and was waiting in between the runways; on taxiway golf; to cross runway 16R for after two departures. We coordinated the crossing to occur after the aircraft Y departure about 3 minutes prior. The IFR aircraft Y was at rotation passing taxiway foxtrot and the first final cherokee was on a 1 mile final when aircraft X requested a right downwind departure. I scanned the runway and cleared the aircraft Z for takeoff without delay traffic on a 1 mile final. I was alerted to the crossing when the bonanza was crossing the hold bars and gave alternate instructions to cross runway 16R and hold short of runway 16L. Aircraft Z did not take the instructions and continued to maneuver for takeoff runway 16R and I cancelled takeoff clearance and instructed aircraft Z to turn right at taxiway delta; in which they complied. When I was scanning the aircraft at golf was not visible. Taxiway golf is blocked by the radar screen and the support beams for the tower. I was trying to hit a departure hole between the arrival and departure to not delay the aircraft Z to have to wait for the aircraft on 4.5 mile final.cross aircraft Z to depart runway 16L. Move local control 1 and local control 2 to different positions to eliminate blind spots.

Original NASA ASRS Text

Title: An aircraft was instructed to hold short of a runway. The aircraft disregarded the instruction and entered the runway. The controller's views toward that particular direction are blocked by a radar display and support beams causing a delay in the Controller noticing the runway incursion.

Narrative: Traffic volume was beginning to slow after a departure and arrival push with weather to the west of the airport. I had two IFR departures left to depart with two aircraft on final. Local Control 2 had landed a Aircraft X and was waiting in between the runways; on taxiway Golf; to cross Runway 16R for after two departures. We coordinated the crossing to occur after the Aircraft Y departure about 3 minutes prior. The IFR Aircraft Y was at rotation passing Taxiway Foxtrot and the first final Cherokee was on a 1 mile final when Aircraft X requested a right downwind departure. I scanned the runway and cleared the Aircraft Z for takeoff without delay traffic on a 1 mile final. I was alerted to the crossing when the bonanza was crossing the hold bars and gave alternate instructions to cross Runway 16R and hold short of Runway 16L. Aircraft Z did not take the instructions and continued to maneuver for takeoff Runway 16R and I cancelled takeoff clearance and instructed Aircraft Z to turn right at taxiway Delta; in which they complied. When I was scanning the aircraft at Golf was not visible. Taxiway Golf is blocked by the Radar screen and the support beams for the tower. I was trying to hit a departure hole between the arrival and departure to not delay the Aircraft Z to have to wait for the aircraft on 4.5 mile final.Cross Aircraft Z to depart Runway 16L. Move Local Control 1 and Local Control 2 to different positions to eliminate blind spots.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1307107
Time
Date	201511
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Small Aircraft High Wing 1 Eng Fixed Gear
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Route In Use	None
Flight Plan	VFR
Aircraft 2
Make Model Name	Small Aircraft Low Wing 1 Eng Retractable Gear
Operating Under FAR Part	Part 91
Flight Phase	Landing
Route In Use	None
Flight Plan	VFR
Person 1
Function	Local
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) .9
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Less Severe Deviation - Procedural Clearance Ground Incursion Runway

An aircraft was instructed to hold short of a runway. The aircraft disregarded the instruction and entered the runway. The controller's views toward that particular direction are blocked by a radar display and support beams causing a delay in the controller noticing the runway incursion.