Wednesday, July 5, 2017

Marjorie Morgan: Riding the Rail Means an Endless Parade of Buses

On July 4, 2017, the Honolulu Star Advertiser published this humorous and poignant account of rail usage in Honolulu in 2030 (maybe):

My family can hardly wait. We can see how rail will change our lives forever.

First thing each weekday, we’ll walk from our home to the shuttle bus stop. It will take only 10 minutes, and the weather will probably be accommodating.

We will patiently wait for the bus, and hope it comes within 10 or 15 minutes. Sooner or later it will take us to the nearest train station, where within minutes we will be on our way to town.

The 20 stops will be humbug, but we will dependably reach the Ala Moana train station not much more than an hour after leaving our home.

Unfortunately, that won’t be the end of our commute. From the Ala Moana rail station, Mommy will then take bus No. 1 to work. Daddy will take bus No. 2 to work. Mikey will take bus No. 3 to Saint Louis School. Sally will take bus No. 4 to Saint Francis School. And baby will take bus No. 5 to preschool.

Oh wait, baby can’t go on the bus alone. I guess Mommy will take baby on bus No. 5 to the preschool. After dropping baby off, Mommy will patiently wait for a bus No. 6 that is headed back to the rail station. From there, Mommy will transfer to bus No. 1.

After work, Daddy will walk back to the bus stop closest to his office, which in his case is only a half-mile and partially protected from the elements. After waiting there for 10 to 15 minutes, Daddy will take bus No. 5 to within a quarter-mile of Mikey’s baseball game. Sally’s walk from her school to her bus station will take only 10 minutes, and the wait for her bus only another 15 to 20 minutes, but her bus stop will be only 5 to 10 minutes from the ballpark where she will join Daddy at Mikey’s game.

When her workday ends, Mommy will take bus No. 1, transfer to bus No. 6, pick up baby, wait for a bus No. 6 headed in the opposite direction, eventually transfer to bus No. 5, so that she and baby can meet the rest of the family at the game.

Afterward, the family will walk to, and wait for, bus No. 8 … transfer to bus No. 9 … and eventually reach the downtown rail station where everyone can enjoy a wonderful dinner.

Oh wait, too expensive. Instead, we’ll just ride the train back to the west side, find seats as riders start getting off at 20 stations, walk to our bus stop where we will eventually take bus No. 10 to within a 10-minute walk of our home.

Unless something unexpected happens, we will enjoy the walk and be home by the kids’ bedtime.

Oh, wait. I forgot about dinner … and working out tomorrow’s transportation plan. Except for Sally’s swim meet at a cross-town school, baby’s doctor’s appointment at Queen’s, and Mikey’s soccer practice, it will be a lot like today’s terrific schedule.

Oh wait, what about stopping off at grandma’s place to wish her a happy birthday? That could be a problem. We don’t expect to have money in the budget for an occasional side trip by taxi once the city raises our property taxes to pay for rail operations.

And to pay payments on all the rail bonds as they come due, the city will need to cut many corners, but that’s OK. I’m pretty sure my kids will get used to not having air-conditioning, clean seats, or any form of security in or around the rail stations.

The trains may be dilapidating, cement guideways crumbling, steel rusting, and escalators stalling, but at least my family will have rail.

Friday, June 30, 2017

Passenger Train Evacuation on Elevated Guideways

Following a major subway derailment in New York City, Michelle Matsuo asked many questions on a transit forum. I answered them below.

In Honolulu, if a train derails, will it hurtle off the guideway?  
Normally it will not and HART route alignment, unlike Chicago's L for example, does not have 90 degree turns. While unlikely, under extreme conditions a HART train can jump the tracks and fall off the guideway.

If there is a malfunction somewhere on the track, will a train get stuck between stations?
If a train breaks down, then it will be stuck. A following train may be commanded to push the broken down train to the nearest station.

If there is grid power loss, then nearby stations have generators to provide enough power to pull the train to the nearest station.

Do the windows open?  If they do, is it enough to keep people from cooking in the train?  
Typically windows do not open. There may be vents that can be opened.  Unless there's loss of grid power, the train may break down mechanically, but the a/c should still be functional. If the a/c dies, then people will need to be removed within a few minutes during hot conditions.

If they open, then will people be tempted to walk along the guideway, and will they get electrocuted by the third rail? 
There is an emergency walkway in the middle as shown in the picture below. In an emergency with smoke, extreme heat or other need to abandon the cab, people should be advised to exit on the narrow walkway, walk a short distance away from danger, then sit down and wait for rescue. In such extreme conditions, walking on the track may be necessary and can be safe as long as people stay well clear of the third rail (see gray line on the left side of the picture.) Given the design of HART guideway, if evacuation of the passengers is needed along the guideway, then the situation will be risky for several reasons.

What is the repair protocol for the trains and the tracks?
At frequent intervals there are switches (see sample train track switch below) so trains can go from the left track to the right track (and vice versa) and in effect "overtake" the disabled train. Eventually the control room has to decide the best time and method to deal with the problem, such as sending crew for on-site repair or pulling the broken down train to the yard.  A disablement that cannot be fixed quickly on site will cause delays to the operations.

The tracks should be inspected and maintained on a schedule so that they do not generate failures during operations. These are usually done off peak or at night.

If the track is neglected, as at the Washington Metro, then multi-day closures of the line may be needed if the condition is deemed unsafe or difficult to fix at night. It may be still be possible for HART to run trains on a single track while the other track is being repaired, but intervals between trains will be long.


Apparently this is an area that is lacking sufficient attention, as federal guidelines seem to date back to 1985: Recommended Emergency Preparedness Guidelines for Rail Transit Systems.

A 2014 technical article A new approach for modelling passenger trains evacuation
procedures states: "In most emergency situations, a successful evacuation and rescue can mean the difference between life and death. In passenger trains, the crew are responsible for passenger safety." HART trains have no crew on board.