How to determine what the U and S designate in the Introductory Data table for the

Products affected: MapInfo Pro™
The of the Introductory Data that ships with MapInfo Professional have a "U" or "S" in front of the road numbers in the Route_Number column.

The "U" prefix in the Route_Number field in the indicates a US route, and the "S" prefix indicates a State Route.

browser of Secondary_rds table
UPDATED:  August 28, 2017