What does Joshua 20:8 mean?

On the east side of the Jordan, across from Jericho, they chose Bezer in the desert plain from the tribe of Reuben, Ramoth in Gilead from Gad, and Golan in Bashan from Manasseh. Joshua 20:8 - Modern Text Bible

(Three more cities are set up on the other side of the river, so people living there have the same chance for safety and justice.)