In a hot country, a new road never gets to enjoy its youth. Bitumen is the black binder that glues stone and sand together in asphalt. It softens as temperatures go up, and in high heat it can melt. When heavy traffic, humid air, and monsoon rain are added, cracks and potholes tend to follow soon after a fresh surface is laid. A Dhaka Tribune report noted that roads in Bangladesh's subtropical climate can develop cracks and potholes relatively quickly.
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