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More roads aren't made from concrete due to several factors:

1. Higher upfront cost: Concrete roads are more expensive to build initially compared to asphalt.
2. Longer curing time: Concrete takes longer to cure, leading to extended construction times.
3. Noise: Concrete surfaces can generate more noise than asphalt, which is a concern in urban areas.
4. Repair difficulty: While concrete is durable, repairing it can be more challenging and costly than fixing asphalt roads.

However, concrete is durable and often used in high-traffic or long-lasting applications like highways.
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Traction plays a role in the choice between concrete and asphalt for roads. Concrete generally offers better traction, especially in wet conditions, due to its rougher surface texture. However, asphalt can provide superior traction in warmer climates because it has a slightly softer surface, which helps tires grip the road better. Asphalt is often preferred for roads with frequent turns or intersections, while concrete's traction and durability make it ideal for highways and heavy traffic areas. Traction can be adjusted in both materials by texturing the surface during construction.