The 1988 Carrollton bus crash happened during the time I worked for the state fire marshal's office and I was one of the three involved in this fire from the SMFO. There were 66 or 67 people on the bus. Of that, 24 children and 3 adults were killed due to the fire. Of the remainder, only 6 escaped the fire uninjured.
There were several improvements to school bus safety that came from this incident. They include additional exits with better marking of them (reflector tape), roof escape hatches, seat materials that do not support combustion as easily and the use of diesel rather than gasoline, as fuel.
The problem was that these recommendations applied only to a new bus. There was no requirement to upgrade the existing due to cost. The bus involved was owned by a church who purchased the bus from a school system after living its life there.
Also since then, but not directly as a result of, Kentucky lowered its DUI level from .10 to .08.
Unfortunately, Kentucky (and I'm sure we aren't the only ones) takes better care of concrete and squirrels than they do humans. If I'm a truck driver with a too heavy load, there's a guy in a car with blue lights, a badge and gun, who will issue me a citation and I go immediately before the judge. If I'm stressed because of this encounter, I get my gun and go squirrel hunting, even though it's out of season. There's another guy around who also has a car with blue lights, a badge and a gun, who will issue me a citation and I go immediately before the judge again.
Now I got a lot of fines to pay, so I need some money. Fortunately I own a bar on the side. I can cram that place with twice the legal number of people, lock doors so people won't sneak out on the bill. The fire marshal doesn't have blue lights, perhaps a badge in his pocket, and certainly no gun is carried. The fire marshal has to go through a lengthy process to get me before a judge (when I did the state fire marshal thing for 12 years, only once did a case go to court, and then nothing was done to the guy). Also I've seen just one administrative fine of $250 issued after a principal repeatedly locked exit doors.