How can i create Ditch in filling section for earthworks by using input files?

Question

I want to create a trapezoidal drain in filling section using input files for earthworks as marked in the below image: 
 
 So, Please if anyone can throw some light into this topic 
 I have also input file for INTERFACE as follows but it is not completed: 
 INTERFAC,DTM DPR,DESIGN DPR 260,MCL0,2=IAL0,3=IAL0,4=-11,5=700,8=1570 261,TX00,2=ESL0,7=0.5 262,TX00,3=IA00,5=1.5,7=-0.5 262,TX00,3=IB00,4=3,5=1,7=0 262,TX00,2=IB00,3=IC00,5=1.5,7=0.5 262,TX00,2=IB00,7=-0.5 263 
 By using this i can only create as shown in below image i can only create berm but could not able to create trapezoidal drain section.

Mark Marnell · Answer

Is the ditch independent of the side road? By that I mean, does the ditch get placed based on the main road only? If so, just do something like the following. 
 INTERFAC,GROUNDMODEL,NEWWORKMODEL 260,MAST,2=IC15,4=1,5=10,8=100 261,IGN,VERR,IF15,5=1,7=-1 261,IGN,IF15,IS15,4=3,5=2,7=0 261,AUTO,7=1 263 
 If it is always there, you could also use DESIGN to create the strings, as you know the offsets you want.

Ibrahim RANGWALA · Answer

Thank you sir for your response but I want to create using 262 option as my road is entirely in filling so it will not be able to create the ditch using 261 option. 
 anyways I will try with your suggestion also.

Mark Marnell · Answer

It makes no real difference if you use 261 or 262 - the slopes are defined using each. In this example, just change the 261 to 262, and you will get the same result.

How can i create Ditch in filling section for earthworks by using input files?

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