Visibility continued to be limited, and Greg was never able to get above a thousand feet.

* Selective Visibility: The simple ability to see what is occurring on stage.

In 1990, amendments to the Clean Air Act established the Grand Canyon Visibility Transport Commission ( GCVTC ) to advise the US EPA on strategies for protecting visual air quality on the Colorado Plateau.

Visibility may be poor, because of sediments or algae in the water and lack of light penetration.

Everyday Surveillance: Vigilance and Visibility in Post-Modern Life.

Visibility can be a bit low, especially after rough weather, but the coral is excellent and the variety of fish superb.

Visibility also depends on the eyes of the observer and / or the instruments used.

Special light-diffusing optics and a colored fresnel lens create the indication. Signals such as the 3M High Visibility Signal and McCain Programmable Visibility signal utilize light-diffusing optics and a powerful fresnel lens to create the signal indication.

Visibility may be reduced to 50 metres for days at a time.

* Visibility of the road.

Visibility in traffic is much debated.

Visibility concerns become minimal on bike trails and off-street riding.

* The special issue ( v. 30, no. 5 ) of the journal Environment and Planning-B on Visibility Analysis contains several articles on visibility in urban and natural environments.

Visibility was at its maximum, the sea was placid with a gentle breeze from the north west, a bright, sunny, clear day.

Visibility was no more than.

Since then, features of HV clothing such as the EN510 quick release standard and the EN471 High Visibility standard, have improved the effectiveness and contributed to improved safety for rail workers.

The International High Visibility Clothing Association found numerous flaws with the prevailing EN471: 2003 and ANSI / ISEA 107-2010 standards.

Visibility is vital and that face should immediately allow you to identify a Kia even from a distance.

Visibility minimums of 1 / 2 mile ( runway visual range of 2, 400 feet ) are possible with a CAT I ILS approach supported by a ALS, and 3 / 8 mile visibility visual range is possible if the runway has high-intensity edge lights, touchdown zone and centerline lights, and an ALS that is at least long ( see Table 3-5a in FAA Order 8260. 3b ).

The waspish man stopped me three paces from the bicycle barricade, and asked me in French if I had papers to leave France.

He sensed something precious in the perilous moment, something akin to the knowledge gained on his bicycle trip through the French countryside, a knowledge imprisoned in speechlessness.

With leather cups fitted in his handlebars, he steered his bicycle.

But whenever a major purchase was contemplated forty years ago -- a new bedroom set or a winter coat, an Easter bonnet, a bicycle for Junior -- the family set off for the downtown department store, where the selection would be greatest.

" The Old Testament is responsible for more atheism, agnosticism, disbelief — call it what you will — than any book ever written ; it has emptied more churches than all the counter-attractions of cinema, motor bicycle and golf course.

Likewise, in Toronto, the Prince Edward Viaduct has five lanes of motor traffic, bicycle lanes, and sidewalks on its upper deck ; and a pair of tracks for the Bloor – Danforth subway line on its lower deck.

Learning how to ride a bicycle is an example of a type of neural plasticity that may take place largely within the cerebellum.

A bicycle, often called a bike ( and sometimes referred to as a " pushbike ", " pedal bike ", " pedal cycle ", or " cycle "), is a human-powered, pedal-driven, single-track vehicle, having two wheels attached to a frame, one behind the other.

A person who rides a bicycle is called a cyclist, or bicyclist.

They also provide a popular form of recreation, and have been adapted for such uses as children's toys, adult fitness, military and police applications, courier services and bicycle racing.

The basic shape and configuration of a typical upright bicycle has changed little since the first chain-driven model was developed around 1885.

The invention of the bicycle has had an enormous effect on society, both in terms of culture and of advancing modern industrial methods.

Several components that eventually played a key role in the development of the automobile were invented for the bicycle, including ball bearings, pneumatic tires, chain-driven sprockets, and tension-spoked wheels.

The word bicycle was coined by the Belgian newspaper La Gaulois in the 1890s.

It is regarded as the forerunner of the modern bicycle and was introduced by Drais to the public in Mannheim in summer 1817 and in Paris in 1818.

Another French inventor by the name of Douglas Grasso had a failed prototype of Pierre Lallement's bicycle several years earlier.

Starley's 1885 Rover, manufactured in Coventry, England, is usually described as the first recognizably modern bicycle.

Further innovations increased comfort and ushered in a second bicycle craze, the 1890s ' Golden Age of Bicycles.

File: Ordinary bicycle01. jpg | A penny-farthing or ordinary bicycle photographed in the Škoda Auto museum in the Czech Republic

* Recreation: bicycle touring, mountain biking, BMX, physical fitness, and play.

See bicycle infantry.

File: Working bicycle. jpg | A cargo bicycle in Amsterdam, Netherlands

The bicycle has undergone continual adaptation and improvement since its inception.

These innovations have continued with the advent of modern materials and computer-aided design, allowing for a proliferation of specialized bicycle types.