39ft, historically, unless it's CWT track (more modern high-speed rail continuous-welded-track).
Rail is weighed by the yard...( a yard is 3 feet or 36 inches) If you look at the rail and it says 154 on it then it is "154 pound rail". The lighter 138 pound rail is not as heavy duty as the 154 pound rail. There are many different rail weights. In order to "weigh" the rail you would have to see what pound rail you have then measure that by 3 feet then times that by how long the railroad track is that you are trying to weigh.
A monorail
There are a number of railroad jobs available like rail track layer positions or maintenance equipment operators. Schooling is recommended for most of the jobs but there are opportunities to do railroad internships where one would learn the position in a hands on setting. http://www.railroadjobs.biz/classifieds/jobs.htm
Yes, it is illegal to pick up rail ties along the rail track as they are considered property of the railroad company. Removing them without permission is considered theft and could result in legal consequences.
One can purchase a Hornby model railroad track through several specialty model train sites such as new railway modellers, model railroad, hornby, and gpj model railroad.
The distance between the rail line is one (1) metres apart
One.
The first US railroad was in Massachusetts, then Pennsylvania. New Jersey is one state that has retained some of the track from the early 1800's.
One can get a New York MTA travel schedule on the MTA website where they provide both rail (Long Island Rail Road, Metro- North Railroad) and New York City Bus (Bronx, Brooklyn, Manhattan) schedules.
A railway with only one rail is called a monorail.
As far as I know, he had a life time pass for the rail roads. To have one of those, I guess that you had to retire from the rail road.
It is NEVER safe, but if you go on one you could die.