I have a questions regarding the start and stopping of the modifier. I need to get rid/erase the one I encircle to be able to do the roundabout and intersection.
you could stop and start it like you did on the other side
or
you could remove named links or number of links
see help pdf section
20.2.2.2.7.3 Fixed Link - Remove All But Fixed & Remove a Number of Fixed Links
read up on
20.2.2.2.7 Fixed - Remove