Safer railroad braking system delayed by cost, technical concerns By Evan Halper Times Staff Writer The technology has been around for nearly two decades. An automatic braking system can link passenger and freight trains to rail side warning signals, triggering an emergency stop if trains are on a collision course. In addition to improving safety, the technology could boost railroad efficiency as much as 30%, allowing trains to travel faster and closer together. Federal officials investigating Tuesday's fatal crash of a freight train and Metrolink commuter train in Placentia said the accident would have been prevented had the system been in place. But the rail industry and federal officials who regulate the rails have resisted, saying the $3-billion cost is too high. Moreover, they say the technology has problems. Metrolink officials agree, even after Tuesday's crash. "There are an incredibly complicated set of issues that still need to be addressed with this technology," said Metrolink spokesman Francisco Oaxaca. As a result of the resistance, only two U.S. rail lines have the braking systems, to the frustration of regulators who have been calling for their mandatory use nationwide since the mid-1980s. "Tuesday's accident was another one where not having this was a factor," said Keith Holloway, a spokesman for the National Transportation Safety Board. "When it keeps coming back up again and again that this could have been an issue in accidents, we need to address it." Investigators believe the Placentia crash was caused when the crew of a Burlington Northern Santa Fe freight train ran past two warning signals, plowing into the double-decker passenger train. Two passengers died and more than 100 were injured. The freight engineer told Placentia police he couldn't see the signals because the morning sun blinded him. The NTSB--which handles safety investigations for the federal government, but lacks regulatory authority--has pressured the Federal Railroad Administration for years to require the automatic brakes. Yet rail administration officials maintain the cost must come down before they can force companies to use it. The rail industry hopes to create a system compatible across U.S. rail lines. Such tests have been going on for at least 15 years, and at one time included a pilot program in Southern California with Burlington Northern Santa Fe. A central question in the debate is whether spending money on the computerized brakes is the best way to save lives. Only a fraction of train accidents are the result of train-on-train collisions. Most are caused by cars stuck at road crossings or pedestrians on the tracks. "It is difficult to put a value on human lives, but to a certain extent the railroad industry has begun to do that," said Tom Sullivan, an Oakland-based transportation technology consultant. "In this case, it costs them about $3 [million] to $5 million a life to install these systems." Railroad companies say they are waiting for the signaling industry to produce "off the shelf" products that would make the technology cheaper and able to be used compatible across their rail networks. "What good is it if a locomotive from L.A. won't work when it interchanges onto an eastern railway?" said Warren Flatau, spokesman for the Federal Railroad Administration. "Those things are being worked out. It takes time to build consensus." So in the age of cell phones and Palm Pilots, train operators continue to rely on technology rooted in the 19th century. And the industry sees no reason for immediate change, citing few train collisions. The computerized brakes are in place only on a high-speed Amtrak corridor in the Northeast and an Amtrak line in Michigan. Tests on a commuter line in New Jersey and a freight line in Alaska are expected to begin soon. But the most widely anticipated test will take place in Illinois, where the railroad industry and government agencies are spending $35 million to install a satellite-linked braking system on 123 miles of track shared by freight and passenger trains. Trains on that track will be equipped with computers linked to a satellite system and the railroad operations center. If the train is on a collision course, an alarm will sound in time for conductors to stop the trains. If they do not, and a crash appears imminent, the computer stops the train. Dispatchers will know the location of every train within a meter. The system also will sense whether a train is going too fast for track conditions and will slow it down. The computer can sense the train's location in relation to railroad track workers and will be able to warn the conductor and the workers. Trains currently run on a "block" system in which no more than one train can be on a section of track. Signal lights tell engineers when to yield to trains ahead of them. This has caused long delays on tracks shared by freight and commuter trains. Under the automated system, delays would be reduced because computer monitoring allows trains to travel closer together, said Francesco Pellegrino a scientist with Lockheed Martin, which was contracted to build the equipment. Trains also would be permitted to exceed the 79 mph federal speed limit and go as fast as 110 mph. The industry fears investing in technology that may flop. Tom White, a spokesman for the American Assn. of Railroads, says freight companies have experimented with more than a dozen variations of positive control and continue to see flaws. "It can be more complicated than you think," he said. Meanwhile, the NTSB continues to send letters to the railroad administration expressing its disappointment that the braking systems have not been mandated. The board put the systems on its "most wanted" list in 1990, where they remain today. A letter the board sent to the rail administration in June put it bluntly: "Without the installation of [the] systems, preventable collision accidents will continue to occur."
As long as insurance companies continue to pay for preventable accidents, then there is no incentive to spend the money for this. Perhaps someone should talk to them. Frank
A great example of a non-article. What technical issues is the article referring too? What control system? The only way to keep trains safely apart at any speed whilst maintaining high efficiency is with true moving block ATP.
If he couldn't see the aspect displayed by those signals, he should not have passed them. :sad: Boxcab E50
No rule in the GCOR or other rules publication has this restriction? Even if it was his first day on the job, he should have known those signals were there, whether or not he could see the aspect.
Some districts of the old PRR "Old-Tech" ('50s,'40s, ?) nod to the ATS idea called "Cab Signals". Signal current and frequency transmitted through the rails bu the automatic block signal system activates an in-cab display that shows the crew the indication of the last wayside signal by displaying "Clear", "Approach Medium","Approach", or "Restricting"...the four cardinal speed indications. In low visibility, or incidents where the crew is distracted by other events, they won't " miss a signal", and a more restrictive indication sounds an alarm that requires active response. If action to comply with the indication is not taken within a set time, the system applies the air at a "service" rate(NOT Emergency) and can knock out power to the traction system until responded to by a timed reset routine. It's not fool proof, but most helpful to Carrier and crew in making operation MORE safe. Other railroads have expressed interest and the newer "computer " engines can be ordered with the display system installed, but the cost of equipment,deployment and training is still considerable, and of course, it requires an automatic block signal system. (This is my understanding from having worked with it for some time. It may not be precise, but I'll try to get anyone more info if they wish it.) Bob C
There are a few rail roads that do use cab signals... I know the UP does, they use the old CNW system called ATC or Automatic Train Control, it goes from a proceede indication to a restricting when there is a train ahead in a block. it makes it slow to restricted speed and allows the engineer to stop his train in a timely manor. its similar to ATS or automatic train stop which is also used by the UP on old CNW lines. Chapter 17 in the GCOR i believe.
Yes, Triplex, but the NEC and Amtrak lines from Harrisburg Philly also have LSL (Locomotive Speed Limiter) in addition. I'm not very familiar with the system, but it requires the engineer to comply with the signalled speed within a set time,(not just the "response to an alarm" by hitting a reset switch) or it applies a penalty brake. Our trains operating on Amtrak in this area are required to be equipped,cut-in and tested before entering the track. It's cut out upon leaving the equipped territory, as no LSL signal won't allow operating above about 20 mph (Amtrak Restricted speed) as a fail-safe. I believe it uses the same frequency pickup from the track as cab signals, but i'm not sure. Bob C
Chooch.42 is correct on how that works. The CNW system uses the same principal hopefully i can describe this pretty simply at least this is how i see it. 1. Clear signals - highball clear track 2. Signal in cab drops from green to red/yellow signal - train in block ahead and 2 things are possible A- Above 40 MPH - high speed whistle sounds and you have to apply a supression brake setting and stop your train. B- Below 40 MPH - acknowledge signal and get into the dynos- 70 seconds to drop below 20 and below (its easier than some may think, but also depends on your terrain, a nice hill and good dynos, you can drop from 40 to 20 in less than 45 seconds) 3. Stay at restriced speed per GCOR rule 6.28 or stop where the train will fit between crossings. 4. Acknowledge cab signal every 90 seconds (i think) or penalty break application occurs and brings train to stop. 5. Signal goes in cab goes from Red/yellow to green - Highball This is a very basic explanation of how it works also the correseponding sigals go as well If the way side signal is advanced approach (medium approach for you bnsf guys) or a lower signal, you will get train control, unless diverging onto another track in CTC territory. Wow thats long!
Barb, Had to search out this thread...Google threw this in my lap today -not much detail, but it's a start, maybe ? Bob C. http://www.reuters.com/article/inPlayBriefing/idUSIN20071101082317WAB20071101
