This window displays when calculating the volumes in Highway mode. The allows you to calculate the volumes by phase, based on a range of stations, or horizontal extents left and right.
Check All Stations and Total Width to calculate the whole job.
To calculate the left side of the road only, enter 0 for the Right Extent, keeping the Left Extent field empty.
To calculate the right side of the road only, enter 0 for the Left Extent, keeping the Right Extent field empty.