NEW YORK (AP) -- Federal regulators are ordering railroads all over the country to review rules about speed after a New York City derailment that killed four people last week.

The Federal Railroad Administration issued an industry-wide safety advisory Wednesday. It ordered railroads to brief employees on the circumstances of the Dec. 1 Metro-North derailment and train them on the importance of speed limits.

Investigators have found that the Metro-North train was racing at 82 mph as it entered a 30 mph curve in the Bronx.

The directive also says railroads should remind workers about the importance of communication between crew members, including during long periods of inactivity.

Representatives of the engineer on the Metro-North train have said he experienced a hypnosis-like "daze" and nodded at the controls just before the wreck.