air traffic control tower
air traffic controller
airplane
alertness
alpine country
austria
black color
central europe
closeup
color image
colors
commercial airplane
computer graphic
distracted
equilateral triangle
europe
fighter plane
flugbetrieb
frame
geometric shape
horizontal
image
image created 2000s
image created 21st century
image date
isolated on white
no people
private airplane
red
reflection
road
road sign
road warning sign
rounded corner
safety
saturated color
sign
single object
sound
street
stvo
symbol
traffic
traffic regulations
traffic rules
transportation
triangle
warning sign
white