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Push Pull Commuter trains

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Posted by ericsp on Thursday, January 27, 2005 9:14 PM
It is premature to assume this. At least wait until you know the facts to make conclusions.

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Posted by Brydle on Thursday, January 27, 2005 7:37 PM
QUOTE: Originally posted by kenneo

Amtrack runs its Cascade's push=pull, but has a gutted F40PH rebuilt as a baggage car on the push end. It still has the weight to push vehicles off the track.

It is my opinion that train 100 would not have derailed had a locomotive - either "real" or "gutted" been leading. That doesn't mean that there still would not have been an accident given that the collision between the Jeep and #100 took place just as they were meeting another moving train and the stopped ballast train. That Jeep had to go somewhere and there is precious little room between the trains.


Kenneo Yes Amtrack uses gutted F40PH engines on their Talgo Cascades Trains.
I have noted that the US Government has also expressed concern for structural integrity problems with these light weight articulated cars and have mandated that cables be attached between each car to keep them from jack knifing in the event of a derailment.

Using a F40PH gutted control cab does increase the margin of safety.

In the old days of steam on the CPR, a box car was always put right after the coal tender as a sacrificial crush zone. Of course steam engines were very heavy.

I would have less of a problem with push pull operations if they had no level crossings or were on a dedicated line. This still does not protect the cab control car from derailing by way of slides. The West Coast Express’s only derailment was from just that, a slide that derailed the control cab car, however it remained upright and only sustained some undercarriage damage.
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Posted by Anonymous on Thursday, January 27, 2005 7:14 PM
Trains have been running push-pull for decades. Lets not get crazy here. Yes its was horrible but we can't stop and change the world because of it. Are you willing to pay extra $$$$ to for all the grade separations around the country????
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Posted by GP-9_Man11786 on Thursday, January 27, 2005 7:14 PM
Originally posted by kenneo

"Amtrack runs its Cascade's push=pull, but has a gutted F40PH rebuilt as a baggage car on the push end. It still has the weight to push vehicles off the track."

The Long Island Railroad used to used to use gutted Alco FA1s on the as HEP generators on the push end. However, the LIRR switched to cab-control cars on it's diesel only push-pull trains. Dual-mode trains have a locomotive on each end.

I wonder what would have happened if MU cars had been invoved instead of a push-pull train.

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Posted by kenneo on Thursday, January 27, 2005 7:01 PM
Amtrack runs its Cascade's push=pull, but has a gutted F40PH rebuilt as a baggage car on the push end. It still has the weight to push vehicles off the track.

It is my opinion that train 100 would not have derailed had a locomotive - either "real" or "gutted" been leading. That doesn't mean that there still would not have been an accident given that the collision between the Jeep and #100 took place just as they were meeting another moving train and the stopped ballast train. That Jeep had to go somewhere and there is precious little room between the trains.
Eric
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Posted by BaltACD on Thursday, January 27, 2005 6:09 PM
Whether in push or pull mode the incident highlights the need for grade separation.

For my two cents....control car operations should only be permitted where there are no street crossings at grade.

The vehicle struck, was a Jeep Grand Cherokee....not one of the bigger vehicles on the road. Cab control cars are, in my estimation, too light and have too little collision protection to 'safely' withstand a collisions at a grade crossing.

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Posted by cnw4001 on Thursday, January 27, 2005 5:49 PM
Jury is out on the question and will remain so despite extended debate. Push-pull is becoming the standard around the world on commuter operation and even some medium distance trains. Unless I'm wrong Amtrak runs their Michigan-Chicago trains push pull and that's quite a haul.

It may be down by the time you read this but today's LA Times has a story detailing the debate. It's part of thier coverage of the Metrolink crash and one of the few items which doesn't require registration to read, or at least didn't today.
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Posted by mustanggt on Thursday, January 27, 2005 5:43 PM
I was thinking the same thing. Once I heard of a commuter train somewhere in the northeast hitting an 18 wheeler, and It was in push mode, and half of the front coach was destroyed. several people died. But then again the engine being crushed into the first car would do just as much damage...
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Push Pull Commuter trains
Posted by Brydle on Thursday, January 27, 2005 5:34 PM
Re the Metrolink Crash in Glendale, CA Jan. 27, 2005. I am sure that if the train had been in the pull mode rather than the push mode there would have been fewer lives lost.

The passenger controlcab car is much lighter than a locomotive, and hence will derail more easily.

It is interesting to note that the car next to the locomotive was not crushed by the locomotive, which one would expect as the locomotive is much heavier.

We have a similar operation with the West Coast Express between Vancouver and Mission B.C. Canada

All trains are in the push mode west bound into Vancouver in the Morning.

I have warned friends who ride it to not ride in the front car in push mode or in the car next to the Locomotive, as these two cars are at greatest risk for personal injury in the event of a collision or derailment.

Should the Government re-examine the saftey aspects of push pull operations?

Your comments please.

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