split line in intersection in arcmap 10.8

To split a line at its intersection with another line in ArcMap 10.8, you can follow these steps:

### Method 1: Using the 'Intersect' Tool

1. **Add Your Layers**:
   - Make sure both line layers (the one to be split and the intersection line) are added to your map document.

2. **Open the ArcToolbox**:
   - Go to `Geoprocessing` > `ArcToolbox` to open the toolbox if it’s not already visible.

3. **Search for the Intersect Tool**:
   - Navigate to `Analysis Tools` > `Overlay` > `Intersect`.

4. **Set the Inputs**:
   - In the Intersect tool dialog, add the two line layers you want to interact with.

5. **Specify the Output Feature Class**:
   - Define a location and name for the output feature class that will contain the split lines.

6. **Run the Tool**:
   - Click `OK` or `Run` to execute the tool. This will create a new feature class with the intersections.

7. **Editing (if necessary)**:
   - You may want to manually edit the resulting lines to ensure you have the desired splits, using the `Editor` toolbar.

### Method 2: Manual Editing

If you want to manually split the lines:

1. **Start Editing Session**:
   - Click on the `Editor` toolbar and choose `Start Editing`, selecting the appropriate layer.

2. **Select the Line to Split**:
   - Use the `Select Features` tool to select the line you want to split.

3. **Split Tool**:
   - On the Editor toolbar, choose the `Split` tool (it looks like a scissor icon).
   - Click on the intersection point on your selected line where you want to split it.

4. **Finish Editing**:
   - Once you have made the necessary splits, finish the editing session by clicking `Editor` and then `Save Edits`.

### Important Notes:

- Ensure that you have necessary permissions to edit the datasets and that you save your edits after making changes.
- If the lines are not intersecting precisely, you may need to adjust the geometry or snap settings before performing these operations.
- You may want to consider working with shapefiles or feature classes in a geodatabase for better performance and functionality.

This approach should allow you to effectively split lines at their intersections in ArcMap 10.8.