How to show railroad linear mileage for each subbasin .. Intersect?

[LucasVerret]

I have 2 shapefiles (1 polyline for railroad tracks and one polygon showing sub basins). My task is to show linear mileage of  the railroad track for each sub basin. I have heard intersect is the best way to do this. Any better ideas, or am I on the right track?

Thanks

[JimCousins]

Intersect will cut your rail polylines with the polygons. You will still need to select the polylines that fall within each polygon, and total their length. Once they are intersected, you could do a spatial join to associate the sub basins with the rail lines, so you can do a summary on the basin ID, returning the sum of rail line lengths.
Regards,
Jim