Why did the colonist widen the foot trail?

They needed space for the railroad.

They wanted more space for the canoes.

They could hunt better.

They wanted more space for riding horses.

in order to gain control over the territory and increase passage of wagon and people.

Explanation:

In 1796, an improved all-weather road was opened for wagon and carriage travel.

The road was abandoned around 1840 (construction on the National Road after Vandalia, Illinois also stopping due to the Panic of 1837 and early railroad construction), although modern highways follow much of its route.

Because of the threat of Native American attacks, the road was so dangerous that most pioneers traveled well armed. Robbers and criminals also could be found on the road, ready to pounce on weaker pioneers.

pretty sure they split up because of religious conflicts.