Highway Tax Equity and Simplification Act of 1999

Highway Tax Equity and Simplification Act of 1999 - Amends the Internal Revenue Code to repeal the heavy vehicle use tax. Shortens, by five years, the termination of the tax on heavy trucks and trailers sold at retail and the termination of the tax on tires. Reduces the tax rate on diesel fuel. Establishes a tax on the use of certain vehicles (over 25,000 pounds) based on a weight-distance rate. Provides for a study concerning highway taxes.