Merging the ballast template when producing a earthworks corridor

Hi All,

I am new to Bentley Rail Track and have been attempting to model earthworks for a set of railway lines.

Modelling the earthworks is coming along well, however when two sets of rail lines run close to each other, the template for the sleeper and ballast overlap/clash (see first image below).

Is there anyway to tell the program to merge the ballast template at the point at which two tracks begin to run closer to each other? 

Thank you !

Nimesh