
1. Engine: Blender Game
- Info menu >> Render Engine box >> Blender Game
Note:
- There are menus that are only available when The Blender Game render engine is selected.

2. Enable LoopTools
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User Preferences menu >> Addons button
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Supported Level >> Community
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Categories >> Mesh
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Mesh: LoopTools checkbox
Note:
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LoopTools: Loft is used to "skin" the loop of vertices used to create the race track
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Enable LoopTools adds a LoopTools tab to the Tool Shelf (3D View menu >> View >> Tool Shelf)

3. Add a Bezier Curve
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3D View menu >> Add >> Curve >> Bezier
Note:
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The Bezier Curve is used to create the path for road
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You can use a Nurbs Curve or a Nurbs Path instead.