Washington ? President Barack Obama’s high-speed rail initiative would get an enormous boost under a spending bill that a House committee approved Friday.

Obama sought $1 billion for construction of a high-speed system and other intercity rail lines, which would come on top of $8 billion provided in the economic stimulus bill in February.

The House Appropriations Committee decided to provide $4 billion, part of a $123 billion measure covering transportation and housing programs.

Rep. John Olver, D-Mass., said the earlier money had generated about $70 billion in grant requests for high-speed rail projects.

The measure also gives the money-losing Amtrak passenger railroad a $1.5 billion subsidy.