module 3.2 quiz Flashcards
visual perception
the eyeball’s ability to distinguish the number, shape, and color of an object, and perception
drivers make make decisions based on about blank on what they see
90%
drivers make decisions based on blank of what they hear or feel
10%
drivers should search at least blank seconds ahead of their path of travel to evaluate the situation and make good decisions about speed, lane position, signs, signals, markings, and potential hazards
20
you need to know where to blank
look
focal vision
allows you to read/see details
paracentral vision
allows you to maintain path of travel
peripheral vision
allows you to see motion and color
visually acuity
tests measure the level of detail your eyes can see (individually and together) in optimal light conditions
nearsighted
able to see near things more clearly than distant ones
farsighted
able to see distant things more clearly the near ones
hazards of driving at night
lack of light drastically reduces field of vision, visual acuity, depth perception, and color recognition
nocturnal and crepuscular wildlife become active
people driving at night are more likely to be intoxicated
inner and outer sources of concentrated light cause glare
people driving at night are more likely to be fatigued
strategies for driving at night
darkness
drive slower to allow more time to react
use focal and paracentral vision
strategies for driving at night
glare
oncoming headlights: avert your gaze to line painted on right side of road
internal light: keep it dark in the vehicle when it’s dark outside
sunbeams: keep windows, headlights, and signal lights clean inside and out
strategies for driving at night
animals
use your high-beams on rural roads
pay attention to animal crossing signs
strategies for driving at night
people
watch for a erratic driving behaviors from other vehicles on the road
stay away from drivers exhibiting signs of distraction, intoxication, or fatigue
factors that affect vision
glare fatigue drugs/alcohol weather darkness speed inattention smoke age dirty windshield poor windshield wipers poor night vision night blindness
speed that effects vision
hazards that increase with the increased speed
drivers have less time to see and react
minor steering movements cause exaggerated vehicle movements and weight shift
speed distorts and reduces peripheral vision up to 90%
how do you compensate for higher speeds?
train your eyes to look farther ahead—you’re covering ground faster
allow more space between your vehicle and others
actively move your eyes from one side of the path of travel to the other to search for relevant information and hazards
need blank eyes to perceive depth (3-D distance)
both
depth perception allows you to perceive blank, blank, and blank of other vehicles and hazards in the traffic environment
gaps
speed
distance
depth perception is blank when passing, approaching a vehicle or hazard; turning, merging, and crossing intersections
essential
to judge the distance between vehicles, look at where the tires contact the road, not the blank of the vehicle
body
you have to have paracentral vision for blank
depth perception
how can you improve your visual field?
clean windows—inside and out
clean vehicle’s outside lights and make sure they work
inspect wiper blades for damage and effectiveness
adjust mirrors properly
keep sunglasses and windshield scraper in vehicle
remove objects that interfere with vision
explain how the eyes don’t tell the brain what they see—the brain tells the eyes what to look for
your eyes don’t wander around because your brain is telling them what to do
