http://www.nhtsa.dot.gov/cars/rules/regrev/evaluate/809222.html
Explain why the railroad industry shouldn't have a similar safety device, when they don't even have side marker lights at relatively close spacing like trucks do. I live a few blocks from a rail line that's often active at night and I know of several crossings on that line which just have a crossbar sign. Spotting dark freight cars at those crossings is very difficult even in good conditions.
Afer re-reading my post, I can understand your response to my post.
What I did not make clear is that government mandated "regulations" cost money to implement.
The 5th amendment states,
"nor shall private property be taken for public use without just compensation."
In the Supreme Court decision of 2000, Nixon v. Shrink, Justice Stevens stated,
"I make one simple. Money is property."
Without some kind of "compensation" mechanism being included with the laws authorizing such regulations for the public use of "safety," then such regulations take money from private property owners for the public use without compensation and thus are unconstitutional.
If the citizens want "safety," the citizens are going to have to pay for it directly with their taxes.