"Mother, what is this?" said Ralph holding up the road map.

"That is a map of our state," said his mother.

"What is a map? What is it for?"

"Well a map shows where we live and these road numbers are marked on the map and on the roads as you drive along and if people follow the right numbers, they can get where they want to go."

"How does it work?" asked Ralph.

"Our town is on this route number 14 and if you are in another town, y…