Note: All interchange designs should be submitted to the Methods Section for review, regardless of whether or not FHWA submittal is required. Consultant designs should be routed through the appropriate District Office
The following information should be submitted to the Methods Section six weeks before the D2 event so the preliminary approval can be sent out 4 weeks prior to D2:
Title sheet
Typical paving cross sections for mainline, sideroad and ramps
Mainline plan and profile sheets
Sideroad plan and profile sheets
Traffic projections (turning traffic volumes)
Proposed interchange ramp configuration
Proposed ramp profile grades
Sideroad left-turn channelization and right-turn deceleration lanes required at ramp intersections
The following information should be submitted to the Methods Section 4 weeks before the D5 event so the final approval can be sent out 2 weeks prior to D5:
Final geometric plan of interchange showing ramp baseline geometry and curve data
Final ramp plan and profile sheets
Geometric and staking details of nonstandard ramp merge/diverge areas
Mainline plan and profile sheets
Sideroad plan and profile sheets
Typical paving cross sections for mainline, sideroad, and ramps
Traffic projections (turning traffic volumes)
Ramp intersection geometric layout and details
Ramp return geometry, jointing/staking and edge profiles
For review purposes only (do not show on the final plan) show the turning path off-tracking on the ramp intersection geometric layout (see Figure 1). The following items should be labeled:
Design vehicle for each turning movement
Turning radius of outside tire path for each turning movement
