WASHINGTON (Reuters) - The U.S. House of Representatives overwhelmingly approved a $284 billion, six-year highway and transit construction bill on Thursday, advancing a measure that eluded final passage last year in a fight with the White House over budget deficits. The legislation, which is 18 months overdue, matches the spending demands outlined in the Bush administration's 2006 budget and the cost of a similar version making its way through the Senate. Many lawmakers in both houses would eventually like to see more money committed to road, tunnel and bridge improvements. The House bill includes a provision that would let Congress...