what does stopping sight distance mean
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Section 3: Sight Distance Stopping sight distance is the sum of two distances: (1) the distance traversed by the vehicle from the instant the driver sights an object necessitating a stop to the instant the brakes are applied; and (2) the distance needed to stop the vehicle from the instant brake application begins.
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Talk:Stopping sight distance The stopping sight distance table isn't intended to represent a real vehicle. The deceleration rate was obtained by measuring drivers, not vehicles. It was found that most drivers will brake at a rate of at least 11.2 ft/s2.
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Sight Distance - Stopping Sight Distance and Overtaking Sight Distance (a) Stopping Sight Distance. (b) Overtaking Sight Distance. (c) Sight Distance at the Intersections. (a) Stopping Sight Distance: Stopping Sight Distance is the sight distance required for a driver to effectively apply the brakes and stop the vehicle without collision with the obstruction on the road.
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- The stopping distance depends on two factors: 1  Thinking distance - It takes time for a driver to react to a situation. During this reaction time the car carries on moving. 2  Braking distance - The braking distance is the distance taken to stop once the brakes are applied.
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"Understanding Your Vision: The ""Imperfect Eye""" Understanding how some of us see differently and how the eyes change over time, will help protect your vision. Normal vision, often called 20/20 vision, means that you can see clearly objects that are 20 feet away. However, 20/20 does not necessarily mean perfect vision.
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- One very important point to remember is that even when the legally blind person is 20 feet away from the object, others with unimpaired vision cannot assume that this person can see all the details that they are able to see.
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Speed, speed limits and stopping distances Braking distances are much longer for larger and heavier vehicles, and in wet or icy conditions, so again these figures are a minimum. Technology such as anti-lock brakes and stability control are designed to enable greater control over the vehicle, not shorten stopping distances. There may be a very small reduction in braking distance with modern technology, but not enough to significantly affect your overall stopping distance [5].
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Following Distance vs Reaction Distance Total stopping distance is the combined distance of reaction distance and braking distance. It takes the average person half a second to think and another half a second react and apply the brakes. That is why most drivers are recommended to give two seconds of empty space between them and other motorists.
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- Legal Definition of Blindness. According to U.S. law, if a person's best eye has an acuity of 20/200 or worse and/or if their peripheral vision is less than 20 degrees, then that person is LEGALLY BLIND.This criteria is used to determine eligibility for driver's licenses, disability requirements, and eligibility for special services.ack of Usable Sight This is a very emotionally charged question which invariably leads to extremely emotional and irrational answers. In our society to be blind is considered to be inferior. To lack usable sight means that you are one sense short of the basic five senses.
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transverse Definition of transverse. 1  1 : acting, lying, or being across : set crosswise. 2  2 : made at right angles to the long axis of the body a transverse section.
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Concrete Curing When concrete is born-when you place fresh concrete where you want it to live out its life-it's like a baby: very sensitive and easily ruined. If you take good care of it, when it's young it will grow up to be a strong and reliable adult; neglect it, and you'll be sorry!
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- for the conditions. Sight distance relies on drivers being aware of and paying attention to their. surroundings and driving appropriately for conditions presented. For the purposes of design, sight distance is considered in terms of stopping sight distance, passing sight distance, and. decision sight distance.
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- entering the eye, is focused on the retina and may produce there an extremely high energy or power density. If the total amount of energy is high enough they can cause thermal damage. One of the main considerations in the retinal hazard (wavelength range of 400 nm to 1400 nm at IEC 60825-1 or 380 nm to 1400 nm at IEC 62471) is the size of the focal spot on the retina - the smaller this becomes, the higher the power/energy density and consequently - the higher the hazard. The smallest focal spot size considered in the updated laser safety standard - the ANSI Z136.1 (2007) Safe Use of Lasers (Ref 1), is 20-30 μm.
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Ambulance crews called out to put old people back to bed Ambulance crews called out to put old people back to bed 10th September 2012.'Boom in Elderly population story.'Pictured generic shot of pensioner walking'Picture by Gerard Binks. Published: 06:30 Wednesday 22 July 2015
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Following Distance Following Distance.  The following distance is a space between your car and the car ahead of you. It is recommended to keep a reasonable following distance so you can safely stop in a case of an emergency, e.g., if the car ahead of you stops suddenly.
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- It's really complicated. total stopping distance is the sum of the perception-reaction distance and the braking distance. D_{total}=D_{p-r}+D_{braking}=v t_{p-r}+ \frac{v^2}{2 \mu g}. A common baseline value of t_{p-r}=1.5 s, \mu=0.7 is used in stopping distance charts.
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Geometric design of roads Sight distance, in the context of road design, is defined as the length of roadway ahead visible to the driver.[1] Sight distance is how far a road user (usually a vehicle driver) can see before the line of sight is blocked by a hill crest, or an obstacle on the inside of a horizontal curve or intersection.
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striking distance Definition of striking distance. : a distance from which something can be easily reached or attained almost within striking distance of their goal.
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- The criteria used by A.A.S.H.T.O. and adopted by Carroll County for computing stopping sight distance is as follows: Height of Driver’s eye = 3.5 feet Height of Object = 2.0 feet The equation for stopping sight distance is: V 2 d = 1.47 Vt + 1.075 a t = brake reaction time, 2.5 sec.
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Talk:Stopping sight distance Stopping sight distance for a given design speed is the minimum distance that a vehicle moving at the corresponding running speed will require to come to a safe halt. It is the sum of the distances traveled during the driver's brake reaction time and during the braking of the vehicle to a stop on a wet pavement.
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- This can mean 'I do not want to see what is in front of me, it is so terrible'. Sometimes when people are talking they close their eyes. This is an equivalent to turning away so eye contact can be avoided and any implied request for the other person to speak is effectively ignored.
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Vision Conditions Judgment of distance impaired by one or more vision conditions can result in the driver stopping too short of the limit line or inside the intersection, turning too wide or too short, and/or failing to maintain speed and/or following distance appropriate for prevailing driving conditions.
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Signal passed at danger Because it takes a considerable distance to bring a train to a stand, many signals are passed at danger at low speed where the driver has applied the brake too late. 1  Often this occurs when the signal at danger cannot be clearly seen until it is closer than the braking distance of the train. It can also be due to: 2  Misjudgement. 3  Inattention.
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Definitions &Translations Princeton's WordNet(1.00 / 1 vote)Rate this definition: stopping point, finale, finis, finish, last, conclusion, close(noun) the temporal end; the concluding time. the stopping point of each round was signaled by a bell; the market was up at the finish; they were playing better at the close of the season.
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Stopping Distance: Is the 3-Second Rule Wrong? Stopping distance: how long it takes to go from 60 to 0 For the average car with reasonably good tires, here’s how it breaks down: In normal driving conditions, it takes roughly 4.6 seconds — also the time needed to read or send a text — to stop safely. And that means if you’re texting while you drive (not good!), you could very easily collide with the car in front of you.
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"What does ""stop"" mean on a stop sign?" What Does Stop Mean. A stop sign is a traffic sign, usually erected at road junctions, that instructs drivers to stop and then to proceed only if the way ahead is clear. Standard stop signs have a specified size of 75 cm (30 in) across opposite flats of the red octagonal field, with a 20 mm (¾ in) white border.