There is no "clickety-clack" on continuous welded rail (CWR). Continuous welded rail is layed in 1320' lengths (a quarter mile). Every quarter mile, one weld is required to bond these two ribbons together, on and on it goes. As far as buckling goes, you're on the right track (pun intended). Expansion, contraction and compression are the three major factors that keep me employed as a railroad worker. In high temperatures, we'll get "kinks" in the track that (I have seen) throw the tracks out of alignment up to 3 feet within a 50-foot distance. The rail looks like a piece of spaghetti. In the winter when the steel contracts, the rail will pop like a cannon and leave up to a 3" to 16" gap. Rail anchors help signifigantly reduce these effects. Anchors are the reason you don't see many "buckles" or rail breaks.
In an ideal world, the air temperature is measured over an extended period of time. Given the temperature range, the track will expand a predetermined amount and will retract a predetermined amount. The whole system of anchors, ballast(rocks) and ties prevents the track from buckling. The idea is that an anchor has a set amount that it will hold, the tie has a set amount it will hold, and the ballast surrounding the tie will hold a set amount. By adding up the retaining force of anchors, ties, and ballast, new rail is stretched or heated to the point where track buckles should not occur.
That being said, there there are many factors which can affect the holding force of the track. Including abnormally high or low temperatures, human error, train braking, age of anchors, condition of ties, etc., etc.
A link is provided to the Wikipedia article on continuous welded rail.
They come in quite a few different sizes. A Caterpillar 1055 series weighs about 42,000 lbs. IIRC. That would be a typical size for "general purpose" applications which would typically consist of public roadways. Smaller ones intended for things such as athletic tracks, paved jogging/bicycle routes, etc. might weigh in the 10,000 - 20,000 range. As for protecting the roads, most of these are fully or partially-tracked units... the tracks distribute the weight over the entire length of the track which makes contact with the surface, and thus, the ground pressure is greatly reduced.
they come about when to night was dark
yes. in running the train, some power is still needed to propel the train forwards. Although some of this can be regained by regenerative braking, there will inevitably be some loss. Unless the train is fully powered on renewables, there will still be pollution as a result of running the train. Even if the train is powered on renewablesand generates no pollution in running, the energy and resources to build the train (not to mention tracks etc) have to come from somewhere, most likely with resultant atmospheric pollution.
For people who are farsighted, images come into focus behind the retina; for people who are nearsighted, images come into focus in front of the retina.
The rubber in erasers comes from a variety of places depending on the eraser. It can either come from plants such as the rubber plant or it can come as a petroleum byproduct.
Well you are required to stop 3 feet minimum of the tracks but im sure if the tracks are operational there will be gates that come up and down they are usually about 10 feet away
The speed limit is 15 MPH when a person comes with in 100 feet of a railroad crossing and can not see the tracks for 400 feet in both directions. If there is a flag person at a railroad crossing the car must stop 15 to 50 feet from railroad.
you come 100 feet of a rail road crossing and you cannot see the tracks for 400 feet in both directions.
Now
The giving of a ring in the shape of a belt buckle began in Victorian times and was symbolic token of the close relationship between the giver and the wearer. Buckle rings have also come to denote strength, loyalty and protection.
its spot welded on each side, if you remove the front fenders you can see the seam where its welded on. drill out the spot welds and straighten any metal that was bent over to keep it from moving and it should come off.
it came from a railroad
No
This September I think.
The ladder does NOT come down, it is just a display in the map. If you look close at it you can see it is welded to the wall.
in July 2013
the ones that come out in the movie