Roadway Alignment

This section defines the horizontal, vertical, and transverse alignment for the Steel Tub Girder Bridge.

Navigation: Bridge Geometry > Roadway Alignment

For detailed parameter explanations, see the Roadway Alignment Reference.

Steps

Step 1: Navigate to Roadway Alignment

Navigate to Bridge Geometry > Roadway Alignment in the tree view.

Roadway Alignment navigation

Step 2: Set Start Station

Enter Start Station as 0.

Step 3: Open Alignment Editor

Click the three-dot icon on the cell and select Editor.

Alignment editor

Step 4: Add Horizontal Curve

Click the + icon next to Horizontal to add a circular segment.

Add horizontal segment

Step 5: Enter Curve Parameters

Enter the following parameters:

• Length: 520 feet
• Radius: 700 feet
• Direction: Towards Right

Curve parameters

Quick Tip: Vertical Alignment

Modify vertical data (grades and elevations) in the Vertical tab. In this example, vertical data is set to 0.

Vertical tab

Step 6: Define Start Cross-Section

Click the + icon next to Transverse to add a cross-section at Station 0.

Transverse section

Step 7: Enter Station 0 Parameters

Enter the following:

• Station: 0 ft
• Left Edge to PGL: 20 ft

Station parameters

Step 8: Add Section Component

Click the + icon next to At Sta+0 to add a section component with:

• Width: 40 ft
• Slope: -5%

Section component

Width and slope

Step 9: Define End Cross-Section

Add another transverse section at Station 520:

• Station: 520 ft
• Left Edge to PGL: 20 ft
• Width: 40 ft
• Slope: -5%

End station

End station parameters

Step 10: Accept Changes

Click Accept to save the alignment.

Accept button

Quick Tip: Viewing Roadway Surface

If the 3D alignment doesn't appear, click Zoom Extents or enable Show Roadway Surface in Settings.

Zoom extents

Show roadway surface

Verification

The completed bridge alignment is shown below.

Completed alignment