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Pablo 88

on 13 October 2014

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Transcript of Bicicles

• Circulation: The bicycles have to ride, if there is any, through the bicycle lane. If there is not any, they have to ride through the road, always respecting the same laws as cars and motorbikes.
• Speed: The speed limit that a bicycle can travel in the city is 45 km per hour, and has always to respect the speed limit in the road it travels.
• Visibility: It is compulsory that the bicycle has reflective lights. During the night, it is obligatory to use front and back lights and reflective coat. It is also compulsory to have a bell.
• Security: In urban stretches is not compulsory to wear helmet if you are older than 14 years old. As in any other vehicle, it is forbidden to ride the bike drunk or under the effects of drugs.
It is also prohibited to listen to music or talking to someone in the phone.

Influence of Bicycles in the Society
Bicycles have provided an economic way of transport to poor and developing communities.
They provide an alternative way of transport to the use of motorized vehicles.
They provide an easy and practical way to get and maintain fit.
In large urban areas, because of the bicycles, the use of cars has decreased and there are less traffic jams.

Relationship of Bicycles with other Vehicles
Uses of Bicycles
You can use your bicycle for several things, for example:
- Travel from one place to another
- Get fit
- Racing
- Have fun
- Socializing
- Mail delivery
- Etc.
Riding Schools
Because of the boom of the last few years in the use of bicycles, new companies have been taking part of the revolution, and have created some schools for older people who want to ride bikes but didn't learn when they were kids.
You can find this services in almost all the cities in Spain and also in some other countries all around Europe and the world.
- They don't pollute the air
- You do exercise while you travel
- You don't have to look for a parking
- It is cheaper than cars and motorbikes
- You don't need fuel
- You don't have to pay taxes as with cars
- You don't need to pass the test to have the drivers' licence
- You don't waste petroleum and its derivates
- You are slower
- You can get easily hurt
- It is more dangerous than other vehicles
- Depending on the weather, there is not a good to use it
- Usually, only one person can ride a bike
- You can't travel long distances
- You get tired
- You can't listen to the radio/listen to music
- You can't carry a lot of things
The History of Bicycles
Bicycle Races
Mountain Bicycles
City Bicycles
Racing bicycles
Parts of a Bicycle
There are several competitions in which bicycles can participate. There are several categories in which we can differentiate them:
Road racing
Time trial
Mountain bike racing

Bicycle racing is recognized as an Olympic sport.
A long time ago, in Egypt and China, there were some rudimentary inventions similar to bicycles. Later, Leonardo da Vinci also made some sketches. In 1817, Karl Christian Ludwig Drais von Sauerbronn, who was German, invented the first vehicle with two wheels. This vehicle didn't have pedals and the person had to move itself pushing the floor with his feet. It was called draissiene. But the person known as the creator of the bicycle is the Scottish Kirkpatrick Macmillan, in 1839, who made a similar invention to the draissiane but with pedals. Later, Frenchmen Pierre Michaux and Pierre Lallement took Macmillan invention and added a crank and enlarged the front wheel, creating the velocipede. After some years of testing, bicycles took back its first ideas and had the two wheels of the same size. In 1888, the Scottish John Boyd Dunlop introduced the first pneumatic tire, which we have been using until now.
The integration of the bicycles with the other vehicles is positive in some cases, for example with the tram, because they don't mix together; but in general, when they have to share the roads with other means of transport, they suffer a high risk of crashing.
The End
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