To allow them to expand and contract with heat and cold. Without those, the road would end up buckling.
You should only have to cross One Major bridge, (and a national border crossing), when going over the Niagara river from Canada to the USA. From Niagara Falls, NY to Rochester NY, the land is mostly flat, with just a few small bridges over water or over roads or over railroad tracks. There are some small bridges, but, they are only a few yards long.
because people had to get over rivers and streams
You mean bridges? Those would be called puentes.
By moving with the earth not making roads or bridges over it
No some bridges are over highways
Employment (rubber tree plantations). Paved roads, bridges, etc.
It has Roads, it has bridges, good houses, shelters and stuff like that. Conquering the incas is best, meaning taking over.
Yes, because most forms have different perposes for many different uses. For example smaller bridges are used for small vehicles such as cars. The bigger built bridges have a better structure for the bigger vehicles such as semis an R.Vs. Also some bridges have many different shapes and forms but there used to attatch roads an to go over the wter ways like creeks,an rivers... :)
They have put bridges across roads so that they don't get run over. They are like hollow plastic tubes, and they were on the BBC News.
yes water can get in the small gaps where the floor is locked together and soften the tongue and groove causing the gaps to bubble and look ugly over time
There are about 1,500 bridges in Amsterdam. One of the most famous is Skinny Bridge or Magere Brug, a wooden drawbridge
There are three main reasons why bridges freeze before roads. The first is that a bridge is exposed from below and above, unlike a roadway. Roads don't freeze over as quickly because they can take advantage of insulation and warmth from the soil below. Bridges, on the other hand, are beset with cold temperatures from all sides, which can cause them to ice over quickly. Bridges also freeze rapidly because many of them are located over cold spots, like frozen rivers or deep ravines. The third reason that bridges freeze before roads is their construction. The materials used in the core of a bridge are excellent heat conductors. As a result, they draw heat out from the inside of the bridge, transferring it to the surface where it is quickly lost when ambient temperatures are very cold. Bridges often quickly reach the general air temperature, so when the thermometer reads 32 degrees Fahrenheit (0 degrees Celsius), the bridge will freeze .