PennDOT picks HDR-Swank Construction team for rebuild of fallen bridge.

Preliminary report of transportation accident investigative agency, expected by mid-February, will include just facts—not cause—of Jan. 28 incident.

Safety board faults Sound Transit for failing to have "effective mitigation" for hazardous curve that lacked operating train-control safety system.

With 95% of gas meters relit as of Dec. 5, Columbia Gas of Massachusetts appears to be on track to meet its self-imposed deadline to restore natural gas service to Massachusetts in the wake of a series of massive gas explosions. 

Safety Board says state should require professional engineer review of gas-company plans and P.E. seal on drawings.

Board says distraction likely due to commuter train's radio messages after emergency stop nearby.