Wow. Time to take the meds...
Sure, he could go away to make you happy...or, I don't know, we could be nice and try to inform rather than insult. I know, I know...I need to catch up to how people talk to eachother these days. You annoy me slightly! That means you're going to destroy America! Now show me your birth certificate so I can accuse you of faking it!
As I recall from my old CDL training buses are supposed to come to a complete stop and check for rail traffic before crossing a railroad at grade. If the railroad is marked "Exempt" normally a black on white, rectangular placard below crossbucks the bus does not have to stop. My father was always a real stickler about that rule when it came to our school buses, complaining about failure to stop until disciplinary action was taken.
I believe these rules date back to several horrific collisions between trollies and "steam railroad" equipment. I can't recall the details or date/location of the specific incident, but I recall a story my Pop-Pop (trolley driver for PSCT in Jersey) used to tell me about a trolley that had mostly school-bound children aboard that failed to observe a crossing or perhaps the gates didn't work and was hit at high speed by a commuter train. For some reason I'm thinking it was Pittsburgh or Cleveland, but I'm really not sure. Pop-Pops always have the best stories, don't they?
Off Topic- By the by, the same Pop-Pop was the man behind the stop that every PCC used to have to make on the Newark 7-City Subway Line before entering the subway portion of the line! He was operating either a PCC or an older car during a streak of bad weather, entered the tunnel at track speed and due to some freak ice behavior couldn't stop in time when he reached the bottom of the hill. He hit the back end of another car pretty well. No one was hurt and he earned himself a week off. I recall fondly talking to the older PCC drivers many years ago before the cars were mothballed. A few of the older men remembered the incident and chuckled about it because in a few minutes he'd have to stop his PCC, maybe 30 to 35 years after the incident. Ahh, trip down memory lane...
Back to the Topic- A railroad can petition the FRA or the DOT (not sure which one) to have a railroad crossing marked "exempt" so certain commmercial traffic, including tankers and buses, needn't stop. Perhaps the DOT of the state can petition the FRA as well because I can't see the incentive for a railroad to do so on their own. Generally the "exempt" status is granted when the line doesn't see much traffic, or perhaps only sees traffic during certain hours. I recall seeing "exempt" signs with certain hours listed on another placard.
Now go use google to search for answers and stop trying to discuss things on this discussion forum!