All vehicles must stop at least ft from the nearest railroad crossing if a signal or flagger is warning of an oncoming train. a. 10

All vehicles must stop at least 15 ft. from the nearest railroad crossing if a signal or flagger is warning of an oncoming train.

Explanation:

If you are the first vehicle at a railroad crossing when there is an oncoming train, you must stop between 15-20 feet from the nearest rail. This is to ensure that there is no chance of collision between the train and the vehicle. All vehicles carrying passegers for hire, like buses, or carrying hazardous material must stop before crossing.

mali had been a state inside of the ghanaian empire. after ghana fell because of invading forces and internal disputes, mali rose to greatness under the leadership of a legendary king named sundiata, the "lion king." the songhai empire, already weakened by internal political struggles, went into decline.