When an asphalt company is joining a new asphalt product to existing asphalt, it is important to create a smooth asphalt transition to ensure a seamless and durable connection. Here are the steps that an asphalt company typically follows to achieve a smooth asphalt transition:

1. Clean the existing asphalt surface: The existing asphalt surface should be cleaned thoroughly to remove any dirt, debris, or loose material.
2. Apply a tack coat: A tack coat is an adhesive layer of asphalt that is applied to the existing surface to help the new asphalt bond to it. The tack coat should be applied evenly to the existing surface.
3. Apply the new asphalt: The new asphalt should be applied in layers to ensure that it is compacted properly and to avoid air pockets or voids. The first layer should be a leveling layer to ensure that the surface is even. The subsequent layers should be compacted using a roller.
4. Compact the new asphalt: The new asphalt should be compacted using a roller to ensure that it is even and level.
5. Apply a sealant: A sealant should be applied to the new asphalt surface to protect it from weathering and to extend its lifespan.

By following these steps, an asphalt company can create a smooth asphalt transition that blends in seamlessly with the existing asphalt surface.