# Roadway

This section defines roadway parameters for influence surface-based live load analysis.

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**Navigation:** Superstructure Attachments > Roadway

For detailed parameter explanations, see the [Roadway Reference](https://docs.openbrim.org/templates/steel-tub-girder-bridge-workflow/superstructure-attachments-stg/roadway-stg).
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## Steps

### Step 1: Navigate to Roadway

Navigate to **Superstructure Attachments > Roadway** in the tree view.

![Roadway navigation](https://openbrim.atlassian.net/wiki/download/attachments/2169274421/image-20230221-130833.png?api=v2)

### Step 2: Assign Bridge

Click the **three-dots icon** on the **Bridge** cell and select **BRG1**.

### Step 3: Define Roadway Dimensions

Click the **three-dots icon** on **Roadway Dimensions** and select **Edit**.

![Roadway Dimensions](https://openbrim.atlassian.net/wiki/download/attachments/2169274421/image-20230221-131220.png?api=v2)

### Step 4: Enter Station and Width Data

Enter the start and end stations with left and right widths:

| Station (ft) | Left Width (in) | Right Width (in) |
| ------------ | --------------- | ---------------- |
| 0            | 216             | 216              |
| 520          | 216             | 216              |

![Station and Width Data](https://openbrim.atlassian.net/wiki/download/attachments/2169274421/image-20230221-131544.png?api=v2)

### Step 5: Configure Lane Parameters (Optional)

Navigate to the **Roadway** tab to adjust lane dimensions and asphalt thickness if needed.

| Parameter         | Value   |
| ----------------- | ------- |
| Lane Width        | 12 ft   |
| Shoulder Width    | 20 ft   |
| Asphalt Thickness | 0.75 in |
| Number of Lanes   | 2       |

![Roadway Tab](https://openbrim.atlassian.net/wiki/download/attachments/2169274421/image-20230221-132121.png?api=v2)

<details>

<summary><strong>Quick Tip:</strong> Station-Dependent Dimensions</summary>

Roadway dimensions can vary along the bridge length. Use the spreadsheet to define different widths at each station.

![Station Dimensions](https://openbrim.atlassian.net/wiki/download/attachments/2169274421/image-20230221-133420.png?api=v2)

![Dimension Variation](https://openbrim.atlassian.net/wiki/download/attachments/2169274421/image-20230221-133509.png?api=v2)

</details>

## Verification

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The completed roadway configuration is shown below.
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![Completed Roadway](https://openbrim.atlassian.net/wiki/download/attachments/2169274421/image-20230221-133836.png?api=v2)