In this exercise we’re going to be exploring adding a mask to an alignment currently I’m in the 07 align-5 drawing which is located in your tutorials folder now you might be asking yourself why would I need to add a mask to an alignment well if you’re dealing with intersections rather than having all sorts of alignments showing within your intersection geometry it’s kind of nice just being able to add a mask to be able to clear out some of the alignment geometry for example if I zoom into this particular intersection between Road a and Road B you can see that we have a couple of offset alignments that look to be disconnected between this point and this point and on the other side of the street between this point and this point now the area in between is our intersection but there is alignment geometry that’s within this intersection however it’s currently being masked if I press escape to deselect my selection take a look at my road B this northernmost alignment you can see that we have alignment geometry that isn’t masked but we’re going to be masking that within this intersection if I go ahead and select that and go into my modify Tab and then select alignment properties
now you’ll get your alignment properties dialog box there is a masking tab available to you within the masking regions you can select this button to add a masking region go ahead and select that and then I’m going to zoom in and I’m going to select the endpoint of this curve and then I’m going to go to the other side and select the endpoint of this curve then click ok and you can see how our alignment is now masked I’m going to do that on the other side as well I’m going to deselect that alignment then select this portion of my alignment and I’m going to go into alignment properties once more within masking select my masking regions select the endpoint of this curve and then the endpoint of this curve then click ok and now you have just successfully masked your alignment geometry
