What was the use of railroads in 1515?
Railroads as such did not exist in 1515, although horse-drawn tracked transport existed over short distances. There was a funicular (upslope tram) called the Reisszug at Hohensalzburg Castle in Austria, which used ropes to carry carts of people and goods on wooden wheels and rails, from the abbey below to the castle above. It was built between 1495 and 1504.
No one person invented the railroad as it evolved over hundreds of years. The first railroads did not have locomotives. Richard Trevithick is credited with creating the first successful steam locomotive. George Stephenson is credited with expanding the use of railroads from being a part of a mining operation to the first passenger railroads.
Well, if your getting the picture of railroads being a whole different thing then today, well it isn't. The railroads look like the ones we use today and they have no difference between them. Don't be offended but who told you that railroads look different then today. Well the trains have changed. Don't fully depend on my answer, and try on www.google.com if you want to be sure that my answer is correct.
Central Pacific Answer: The time zones were actually started with the railroads. The railroads had to be on time and before the universal time zones were initiated, many towns and states, ETC had their own time and railroads had a big problem trying to keep accurate time. The railroads came up with the idea of having 4 time zones for the united states.