# Defining a GENIO road

A GENIO file consists of a number of strings that define the geometry of the roads in the file. When you define a road you select the appropriate strings from the GENIO file. The road name and the names of the selected strings are saved as a comment to the end of the GENIO file.

Because GENIO files do not include the units for the values in the file, you must configure the appropriate units for the GENIO file you are working with in the job.