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Pedestrian crossing

Place designated for pedestrians to cross a road

  • 33 min read
  • 9 chapters
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Matias Garabedian from Montreal, Canada · CC BY-SA 2.0

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Through Road, Street and Traffic light

Marked pedestrian crossings are often found at intersections, but may also be at other points on busy roads that would otherwise be too unsafe to cross without assistance due to vehicle numbers, speed or road widths. They are also commonly installed where large numbers of pedestrians are attempting to cross (such as in shopping areas) or where vulnerable road users (such as school children) regularly cross. Rules govern usage of the pedestrian crossings to ensure safety; for example, in some areas, the pedestrian must be more than halfway across the crosswalk before the driver proceeds, and in other areas, jaywalking laws are in place which restrict pedestrians from crossing away from marked crossing facilities. Even in some jurisdictions with jaywalking laws, unmarked pedestrian crossings are assumed to exist at every intersection unless prohibited by signage.

Pedestrian crossings using pedestrian signals clearly separate when each type of traffic (pedestrians or road vehicles) can use the crossing. Crossings without signals generally assist pedestrians, and usually prioritise pedestrians, depending on the locality. Pelican crossings use signals to keep pedestrians together where they can be seen by motorists, and where they can cross most safely across the flow of vehicular traffic, whereas zebra crossings are uncontrolled and more appropriate for lower flow numbers. What appears to be just pedestrian crossings can also be created largely as a traffic calming technique, especially when combined with other features like pedestrian priority, refuge islands, or raised surfaces.

History

The first pedestrian crossing signal was erected in London in December 1868. It was installed to allow pedestrians, especially Members of Parliament hurrying to vote, to cross Bridge Street to reach the Parliamentary Estate. It was the idea of John Peake Knight, a railway engineer. The signal consisted of three semaphore arms surmounted by a gas lantern which at night showed green and red aspects as appropriate to pedestrians and those on the carriageway (see image here). The semaphore arms were raised and lowered manually by a police constable who would rotate a handle on the side of the pole. However, in January 1869, the gas leaked and caused an explosion, injuring the police operator. No further work was done on signalled pedestrian crossings until fifty years later.

In the early 20th century, car traffic increased dramatically. A reader of The Times wrote to the editor in 1911:

Could you do something to help the pedestrian to recover the old margin of safety on our common streets and roads? It is heartrending to read of the fearful deaths taking place. If a pedestrian now has even one hesitation or failure the chance of escape from a dreadful death is now much less than when all vehicles were much slower. There is, too, in the motor traffic an evident desire not to slow down before the last moment. It is surely a scandal that on the common ways there should be undue apprehension in the minds of the weakest users of them. While the streets and roads are for all, of necessity the pedestrians, and the feeblest of these, should receive the supreme consideration.

On October 31, 1951, in the town of Slough, west of London, the first pedestrian crossing in history was marked. The black and white striped crossings were dubbed "zebra crossings", and the Ministry of Transport had installed 1,000 experimental versions across the UK in 1949 during a "Pedestrian Safety Week". The exact source of the name "zebra crossing" cannot be confirmed with certainty, but it is believed that it came from the visual similarity of the crossing with the stripes on zebra fur. It is believed that the term "zebra crossing" was first used by British politician and military officer James Callaghan.

The first zebra crosswalk installation was described as "equally spaced white stripes running parallel to the direction of vehicle flow for the width of the crosswalk. The stripes are generally 24 inches wide, as are the areas between them. The major value of this design is in its conspicuousness to both drivers and pedestrians. Drivers tend to be more conscious of the full crosswalk width."

From an early test of the design by the Department of Scientific and Industrial Research in 1948, even before any public education occurred, men increased crossing in the desired place from 45% to 53%, women from 63% to 69%, and children from 69% to 81%.

Other patterns tested included transverse, longitudinal, and diagonal stripes, as well as checkerboards. The zebra performed the best, and the Ministry of Transport officially adopted the zebra as the standard design in October 1951. There were fewer pedestrian casualties throughout Great Britain in 1952 and 1953 than in the years prior to the development of the zebra crossings. Dr. W. H. Glanville, director of the Road Research Laboratory reported 7% decrease in pedestrian accidents, a larger decrease in towns with crosswalks than without, 8% decrease in towns versus 2% in rural districts, and an increase of 2% in Northern Ireland where no changes were made.

Norfolk, Virginia was one of the first cities in the United States to test the zebra pattern in 1953. There were 4 pedestrians injured per year at the plain crosswalks, and in the three years after the zebra was installed there were zero.

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