Sen. Barbara Boxer (D-Calif.) and Rep. John Mica (R-Fla.) have introduced competing bills related to highway project funding, according to a story in BusinessWeek. The Senate version is a two-year plan totaling $109 billion; the House bill proposes allotments of $35 billion a year over a six-year period. The debate comes at a critical point in the future of highway construction, with the Highway Trust Fund likely to become insolvent next year.