The weight is certainly a large factor in the crumbling of infrastructure. A bridge made 50 years ago was engineered based on traffic loads they extrapolated at the time. In the 1980’s, there were around 100 million vehicles across the United States. Today, that number has nearly tripled.
Combine a tripling of the number of vehicles with the increasing average weight - sedan or not - and that’s a much larger number than a lot of infrastructure was designed to handle. As a result, roads and bridges are degrading faster and faster.
This is a primary factor in the push to get people into smaller vehicles, which weigh less. As FireRetardant pointed out, CAFE makes this difficult as manufacturers are heavily incentivized to make these longer wheelbase vehicles. Which, surprise surprise, weigh more.
The weight is certainly a large factor in the crumbling of infrastructure. A bridge made 50 years ago was engineered based on traffic loads they extrapolated at the time. In the 1980’s, there were around 100 million vehicles across the United States. Today, that number has nearly tripled.
Combine a tripling of the number of vehicles with the increasing average weight - sedan or not - and that’s a much larger number than a lot of infrastructure was designed to handle. As a result, roads and bridges are degrading faster and faster.
This is a primary factor in the push to get people into smaller vehicles, which weigh less. As FireRetardant pointed out, CAFE makes this difficult as manufacturers are heavily incentivized to make these longer wheelbase vehicles. Which, surprise surprise, weigh more.