When driving the railroad arms will lower indicating a train is coming. However, the conductor will also alert drivers or passerby's by sounding the horn also.
I am not 100% sure but the railroad crossing sign.
A rail road crossing sing.
Vertical rectangle
You look at the sign before a number and that tells you what is to be done to the number that follows.
Advisory sign
[infinty sign]<x<[infinity sign]
A person who tells a train to stop or proceed is typically called a "train conductor" or "train engineer." In some contexts, they may also refer to a "dispatcher," who coordinates train movements and signals. These individuals are responsible for ensuring the safe and efficient operation of trains.
A black and yellow circle that has a R on the right, and a R on the left with an X in the center of the circle. Page 5-18 let me guess you are doing your 84 question assignment!
yield sign
An 'S' sign.
A stop sign.
which sign tells you to slow down because you are approaching a double curve in Texas?