Even if this is true, the business owners' argument to Congress would be that the consumer will pay for it either way; businesses that depend on transportation would just raise prices to compensate.
Why should I be taxed to fix road damage based on a metric that doesn't begin to accurately reflect my actual contribution to the problem?
Additionally, if the trucking industry had to raise rates due to a higher 'road maintenance tax' this may also make more efficient forms of transportation more popular, ie trains.