Maintenance crossovers

1. Create the setup corridor for the top surface using the Setup-MntCrossover-Top assembly. NB or EB baseline alignment. Target the alignment on the other side of the divided roadway with the LinkOffsetOnSurface subassembly. Profiles are either existing surface or proposed.
2. Use the MntCrossover-Slopes assembly along the crossover centerline to create the daylight slopes using the following targets for the subassemblies:

3. Create surface profiles from the setup corridor surface for the edge of gravel shoulders and centerline of crossover
4. Use the MntCrossover-Tracer assemblies (left and right version depending on alignment direction) along the edge of gravel shoulder alignment/setup surface profile.
5. Use the MntCrossover-Tracer assemblies (left and right version depending on alignment direction) along the main roadway edge or pavement alignment. For existing condition use existing surface profile. For new construction, used proposed profile.
6. Create corridor surfaces.

7. Create corridor boundaries.
   • Top follows Crown along NB and SB and ETW along the shoulders
   • Datum follows Crown_Sub along NB and SB and Daylight along slopes
   • Base follows Crown_Pave1 along NB and SB and ETW_Pave1 along shoulders
8. Paste Crdr-Datum into Rfnt-Datum
   • Add breaklines for TIN edge swaps
9. Paste Rfnt-Datum into Rfnt-Top
   • Add breaklines for TIN edge swaps
10. Paste Crdr-Base into Rfnt-Base
    • Add breaklines for TIN edge swaps