NEW YORK - NTSB wants cameras in trains  Two months after the deadly train derailment on Metro-North's Hudson Line, the National Transportation Safety Board has come up with some changes it says will improve safety on the railroad.

On Dec. 1, a train heading for Grand Central Station flew off the tracks as it went around a sharp curve near the Spuyten Duyvil station in the Bronx. Four people were killed, three of them from the Hudson Valley region, and dozens more were injured.

As the investigation moves forward, NTSB officials say Metro-North needs to install inward and outward facing audio and video recorders on all trains. Management then needs to review those tapes regularly.

The NTSB found that the train was going 82 mph entering the curve where the speed limit was 30.

The train's engineer, William Rockefeller, told investigators he went into a daze in the moments before the train left the rails. MTA officials say the locomotive in service that day was equipped with "alerter" technology designed to rouse an inattentive engineer and activate the brakes if he doesn't respond. But Rockefeller was steering by remote controls from the front car, which was not equipped with that technology.

The board also recommends installing speed limit signs at all locations where a permanent speed restriction is in place. Metro-North officials say they've already done that in four locations, including at the crash site.

Some critics say if the engineer is asleep at the controls then speed signs won't help and even the NTSB says signs might not have prevented the derailment.

The railroad says it is closely studying the recommendations.