The new chief safety officer for Washington, D.C.’s beleaguered Metrorail system has promised an aggressive revamp of the agency’s safety culture, correcting deficiencies that have resulted in deaths and injuries to passengers and workers and significantly compromised the 40-year-old network’s infrastructure.

But the White House has threatened a veto and the Senate is unlikely to approve similar legislation.

URS exec takes CEO role at American Bridge; former Mace executive now is a VP at McKinsey.

Ruling could indicate court’s leanings in broader case challenging waters of the U.S. rule.

Negotiators face tight time pressure to produce final compromise version this year