What does Joshua 3:16 mean?

the water coming from upstream stopped flowing. It piled up far away at a town called Adam, near Zarethan. The water flowing down to the Dead Sea was completely cut off. So the people crossed over, right in front of Jericho. Joshua 3:16 - Modern Text Bible

(The river stops way upstream, leaving dry ground for the people to cross. This is a clear sign that God is making a way for them.)