Wednesday, February 1, 2017

It appears TriMet negligence caused derailment

SUMMARY: TriMet had many reasons to worry about the place where the MAX train derailed, and it doesn't seem like they had inspected it.
On Friday, a MAX train derailed at Rose Quarter while going from the Blue Line to the Yellow Line.  On KOIN 6 News, Mary Fetsch noted how "it has never happened before".  However, looking at news media photos and videos, it seems clear that the piece of track was unusable and a derailment was likely to occur:

KOIN 6: Ice-covered tracks derails MAX train in Rose Quarter
KATU 2: Complete MAX derailment on icy track shuts down multiple lines; seek alternate means
KATU 2:MAX train derailment crippled morning commute, TriMet investigating
KPTV 12: TriMet crews restore service after getting derailed MAX train back on track
The Oregonian: Oregon transportation department investigating after MAX train derailment

Moreover, it seems that there were many reasons that TriMet should have expected that something could happen where the derailment occurred and checked to see if the track was OK:
  • While most stretches of track see trains frequently, and there had even been some service overnight since the snow and ice fell, that track does not.  Specifically, it is scheduled to be used just 3 times a day, at 4:17 AM, 4:47 AM and 5:02 AM, by Yellow Line trains going into service.  So normally the last one through would have been 23 hours before.
  • The track and adjacent switch are in the middle of a heavily used street intersection, with lots and lots of vehicles crossing that can push ice, snow, gravel and all manner of other debris into the grooves that the track consists of.
  • TriMet added to the traffic by rerouting busy Line 8 and Line 77 buses through there in order to make room for a bike path through Rose Quarter.
  • Nowhere else do switches or occasionally-used track get pounded by traffic. They are generally in areas where only trains travel, and many have no pavement around them, allowing debris to fall away.
  • Even under normal conditions, that junction is problematic.  Every evening when the opposite move is done to send Yellow Line trains home, a supervisor is dispatched in advance to the area in case the switches do not set correctly after not being used all day.
  • Due to the fluctuating temperatures and heating from the sun, a layer of the snow/ice everywhere had been freezing hard, even on sidewalks where traffic is light weight.
  • I recall a recent news article mentioning that MAX trains were spinning their wheels, which shows that it was already known that problems where happening.
  • Seen on Twitter:

It seems that this was comparable to Halloween 2015 when MAX trains were sent into a pool of water deep enough that the insides were getting flooded.

Also, it should be noted that TriMet could have used an alternative route to get trains onto the Yellow Line, by either having them run reverse on the southbound-to-westbound track, or by sending them across the river and back to get to the eastbound-to-northbound track, both of which see regular use.

Lastly, while some may fault the operator, controller or maintainers for not checking on the track, the real responsibility lies with those above who's job it is to ensure everything gets done.  Plus, many front-line employees feel demoralized, belittled and under pressure to keep going even without a storm, discouraging them from speaking up.  And given that it was dark out, it may have been hard for the operator to closely see the tracks.


The Deacon in Blue said...

Why, after decades of light rail, haven't they figured out a method of de-icing the tracks? Does Chicago have this issue in the winter? New York? Boston? Surely it would seem wise to devote energy into solving this problem prior to adding a new line to Tigard. But hey, I'm just a bus operator.

Jason McHuff said...

Those places don't have track embedded in pavement, especially little-used ones. Running trains frequently keeps tracks open, the problem was that it doesn't happen where the incident occurred. And TriMet signal maintainer says that chemicals can mess up the signal system.

Nedwell said...

So Jason- you've given official(?) excuses why we haven't handled it as well as Chicago, New York, etc... Is your unspoken "therefore," that we should just accept that Trimet can't do any better? This is as good as it gets, into the distant future?

Al M said...

Goddammit Jason if I make an edit leave it alone!
Do I have to remind you who's blog this is ?

ScottyAllenDay said...

Obviously Jason does not have a clue about Boston. After Kenmore Square all the Green Line "light" rail is above ground with tracks and switches in the pavement.