Jesus, do you have a reading comprehension problem?
I will try a different wording that may be of help.
The cost of an american car imported to Thailand increases by between 187% and 328% compared to the vehicles CIF-value (original cost, insurance, freight) after the Thai governments import duties, excise taxes, interior tax and VAT.
The high total cost in % is due to that the taxes are placed on top of each other: Import duty of 80% on the cars CIF-value, excise tax on the combined value of CIF-cost and import duty, interior tax of 10% on the excise-tax total and to finish it of VAT of 7% on the sum of CIF-value, import duty, excise tax and interior tax.
Finally the dealership in Thailand then adds their profit margin, creating the final price I pay as a consumer.
Do you get it now?
Your talk of road tax, taxes in Texas and free trade agreements with Japan and Chile is totally irrelevant.