overlay template design

Question

Hello everyone Can any body help me to design a overlay template of 2 lane in openroads SS4 with following conditions/cases 
 1) If existing road is not symmetrical to proposed center line or existing zig zag , how the point control of both the ex. carriageway edges will be act, it violates the requirement where ex. carriageway leaves the proposed carriageway. 
 2) In any case the area of existing carriageway whether it is riding LHS , RHS or symmetric to Proposed Center line should be considered for milling/overlay ( only if when it comes under proposed area of carriageway) should be applied on that part and for rest it should be designed as new pavements.

Regards 
 Deepak Rawat

Sanders Thomas · Answer

Hi Deepak, 
 
You should be able to accomplish this by constraining your overlay to your existing ground. If your LHS and RHS refers to your linear geometry; within the Overlay Vertical Adjustment command set the Existing Ground Range to Match Existing Linear Geometry. You will then select your Left and Right Linear Geometry as LHS and RHS as you have indicated giving you overlay over exiting carriageway. 
 
Regarding your new pavement, you can create an overlay component(s) beneath your overlay to fill in as the new pavement buildup. 
 
Thanks, 
Sanders

Abhishek Sinha · Answer

Hi Deepak, 
 When you apply point control, you are overriding the template geometry in design corridor and each point can follow only one controlling feature in one corridor. A better way to do this will be to create the template in such a way that it caters to all possible scenarios of Overlay and Widening. A possible solution is shown in the attached images. Instead of point control, Horizontal Feature Constraint option is used within template to identify and follow existing road edges. Display rules are set for all the components and hence you can see that a different component gets applied for any changed scenario.