A panel of international public transportation safety experts outlined at a local convention Tuesday their countries’ safety rules on subways, including the ability to fire managers — lessons carefully listened to by U.S. transportation officials who are trying to create a national subway oversight system.

The session was part of the annual Transportation Research Board convention in which more than 10,000 experts from government agencies, universities and the private sector gather in Washington. Last year the convention was held just before the inauguration when Metro faced its biggest crowds. This year, the backdrop was the June 22 Metro crash that killed nine people.