3di - three digit interstate 2di- one-digit or two-digit interstate Bypass routes - preceded by an even number in the first digit.
Interstate highways are identified by one or two. Odd route numbers runs north and south while even route numbers runs east and west. Even starting digit means the 3di (3-digit) meets another interstate at both ends (loop). We call them as beltways and bypasses.
Natural resources are resources that exist without any actions of humankind. This includes the sources of valued characteristics such as commercial and industrial use, aesthetic value, scientific interest and cultural value
