美國NTSB去年發現有六十八座橋梁是在 AASHTO指導方針公布前所設計的，這些橋梁目前尚未進行脆弱性評估。該會向橋梁所有者發出建議，要求他們使用AASHTO的方法II來計算其橋梁每年倒塌頻率。

The NTSB earlier in the day announced a number of recommendations to address a "serious safety risk" in the wake of the deadly crash. The collision between a military helicopter and an American ...

NTSB Chairwoman Jennifer Homendy gave the update to reporters Tuesday as the agency continues to investigate the Jan. 29 collision between an American Airlines passenger jet and an Army helicopter.

Transportation Secretary Sean Duffy said he’ll adopt the NTSB’s recommendations for the route where the midair collision occurred. He noted there will be some modifications in the guidelines ...

WASHINGTON (AP) — Federal investigators looking into the cause of the January collision between a passenger jet and an Army helicopter near Washington, D.C., that killed 67 people recommended a ...

WASHINGTON (WJLA) — The National Transportation Safety Board (NTSB) on Tuesday provided an update on its investigation into the January midair collision over the Potomac River, that claimed the ...

The NTSB's preliminary report on January's midair collision over Washington's Reagan National Airport reveals high risks in the Washington, D.C., airspace and calls for permanent changes.