Problems with the editor, help!

It is a prop, so it cant be resized.

 

I can help with that. The speed bump is a static object. If I recall, it should be available for most maps. Instructions:

1. Load a level (for my example, I'm using East Coast USA)
2. Press F11, then at the top menu bar, click Window -> Asset Browser
3. Click on ALL, and type in speedbump in the search field, as shown here:

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4. Click and drag the .dae file onto the map
5. Press 1 to move the object, 2 to rotate the object, and 3 to resize the object:

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6. Press F11 again to go back to gameplay. The speed bump should be ready.