springfield train derailment video
See moment another Norfolk Southern train derails
01:55 - Source: CNN
CNN  — 

As federal investigators visit the site of another Norfolk Southern train derailment in Ohio, the company vowed new safety measures in response to its toxic train wreck that ravaged the town of East Palestine.

Norfolk Southern will revamp its hot bearing detector network as part of a new six-point safety plan, the company announced Monday.

“Hot bearing” or “hot box” detectors use infrared sensors to record the temperatures of railroad bearings as trains pass by. If they sense an overheated bearing, the detectors trigger an alarm, which notifies the train crew they should stop and inspect the rail car for a potential failure.

After the February 3 toxic derailment in East Palestine, investigators discovered hot bearing sensors detected a wheel bearing heating up miles before it eventually failed – but didn’t alert the train’s crew until it was too late, according to a February 23 preliminary report by the National Transportation Safety Board.

Currently, the average distance between detectors on the Norfolk Southern network is 13.9 miles. On Monday, the company announced it would examine every area where the distance between detectors is greater than 15 miles and would develop a plan to deploy additional detectors where needed.

Norfolk Southern said other new safety measures would include:

• Working with manufacturers of “multi-scan” hot bearing detectors, which are able to “scan a greater cross-section of a railcar’s bearings and wheels” to accelerate development and testing.

• Adding 13 “acoustic bearing” detectors that analyze the acoustic signature of vibration inside the axle and would be able to identify potential problems that a visual inspection could not. These detectors would be added to “high-traffic” routes in Norfolk Southern’s core network.

• Collaborating with Georgia Tech to advance safety inspection technology using “machine vision and algorithms powered by artificial intelligence to identify defects and needed repairs.”

• Accelerating the installation of new inspection technology, including the use of high-resolution cameras stationed in strategic locations on its Premier Corridor, which is the train line that connects the Northeast and the Midwest and runs through East Palestine.

Investigators probe a 2nd Norfolk Southern derailment

Norfolk Southern train cars lie atop one another after a derailment Saturday in Clark County, Ohio.

About 200 miles southwest of East Palestine, NTSB investigators arrived Monday in Springfield Ohio – where a Norfolk Southern freight train derailed Saturday.

Investigators will be “looking at the condition of the track, the mechanical condition of the train, operations, the position of the cars in the train, and signal and train control among other things,” the NTSB said in a statement. “They will also be collecting event recorder data, on-board image recorders, and will conduct interviews with the crew and other witnesses.”

Investigators with the agency are expected to release a preliminary report in two to three weeks.

The 212-car freight train was heading south through Clark County en route to Birmingham, Alabama, when 28 of its cars derailed – downing large power lines, knocking out power and temporarily prompting shelter-in-place orders for homes within 1,000 feet.

Crews later determined there were no spills from the derailed cars, and authorities said there was no environmental harm.

“There was no release of any chemical or any hazardous material to the soil, to the air, to the water,” Ohio Environmental Protection Agency Director Anne Vogel said Sunday.

The cause of the derailment remains under investigation, Norfolk Southern said.

Four of the derailed tank cars had previously been carrying diesel exhaust fluid and an additive commonly used in wastewater treatment, but they were empty when they derailed, Norfolk Southern General Manager of Operations Kraig Barner said.

“There’s always a small residual amount left in the tanks,” Smith told CNN. “The derailed tank cars are not hazardous.”

Those empty tankers carried residual product in “very minor amounts” that “dried very quickly,” Springfield Fire Assistant Chief Matt Smith said. He said his team checked the crash site and confirmed nothing had spilled onto the ground.

But one car was carrying PVC pellets that affected the soil at the crash site, Vogel said. She said that the EPA “will be onsite ensuring that as cars are removed by Norfolk Southern that the soil is not impacted under the ground.”

After the derailment, authorities sought to assure the community in Clark County that their air, water and soil are safe.

“Since there have been no releases, we’re looking at clean air, clean soil and clean water for our residents,” Clark County Health Commissioner Charles Patterson said. “Technicians will continue to be on site to ensure that there isn’t any contamination that has been missed.”

While the two recent train derailments in Ohio have made national news, data from the Federal Railroad Administration Office of Safety Analysis shows there have been at least 1,000 derailments in the United States each year during the past decade.

Toxic soil removal in East Palestine could take months

The process of removing soil from under the track