Science Fair Projects Ideas - Pelican crossing

All Science Fair Projects

      

Science Fair Project Encyclopedia for Schools!

  Search    Browse    Forum  Coach    Links    Editor    Help    Tell-a-Friend    Encyclopedia    Dictionary     

Science Fair Project Encyclopedia

For information on any area of science that interests you,
enter a keyword (eg. scientific method, molecule, cloud, carbohydrate etc.).
Or else, you can start by choosing any of the categories below.

Pelican crossing

Control panel at a pelican crossing
Control panel at a pelican crossing

A pelican crossing, (from Pelicon crossing: PEdestrian LIght CONtrolled crossing, a synonymous term) is a type of pedestrian crossing. It features a standard set of traffic lights, plus a push button and a further two coloured lamps for pedestrians using the crossing.

The Pelican Crossing was the first definitive light controlled crossing, introduced in 1969, after the earlier failed experiment of the Panda crossing. Previously only zebra crossings had been used, which have warning signals (Belisha beacons), but no control signals. The pedestrian lights are situated on the far side of the road to the pedestrian. A Puffin crossing has the lights on the same side as the pedestrian; a Toucan crossing is a crossing for pedestrians and bicycles.

Green man in the UK
Enlarge
Green man in the UK

In most countries, lights for pedestrians use the image of a "green man" pictured walking (although white is also a common colour), and a "red man" pictured stationary or a "stop hand" suggesting the hand gesture for stop. In parts of the United States (particularly New York City) these lamps may take the shape of "Walk"/"Don't Walk" messages, although pictograms are also seen in some regions. In most of the US, the difference is more often related to the age of the intersection — for decades, only words were used for the signals. The pictograms have only started being used in the last 20–30 years.

Pelican type crossings sometimes have further non-visual indication that it is safe to cross, such as a beep, vibrating button or tactile rotating cone in order to assist blind or partially sighted pedestrians.

East Germany had a somewhat old-fashioned pictogram on the lamps. After the reunification (German Unity Day) it became a cult — the Ampelmännchen (little traffic light man). However, the style in the western states did not change.

Granada's "green man" is really walking. These traffic lights use coloured LEDs which form a picture out of dots. Activation and deactivation of some dots over the time let the man appear moving.

External links

  • BBC article, on the introduction of Panda crossings, and subsequent developments.
Last updated: 10-11-2005 06:46:34
10-26-2009 08:16:03
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
Science kits, science lessons, science toys, maths toys, hobby kits, science games and books - these are some of many products that can help give your kid an edge in their science fair projects, and develop a tremendous interest in the study of science. When shopping for a science kit or other supplies, make sure that you carefully review the features and quality of the products. Compare prices by going to several online stores. Read product reviews online or refer to magazines.

Start by looking for your science kit review or science toy review. Compare prices but remember, Price $ is not everything. Quality does matter.
Science Fair Coach
What do science fair judges look out for?
ScienceHound
Science Fair Projects for students of all ages
All Science Fair Projects.com Site
All Science Fair Projects Homepage
Search | Browse | Links | From-our-Editor | Books | Help | Contact | Privacy | Disclaimer | Copyright Notice