Skyline (Honolulu) Rapid Transit

 https://en.wikipedia.org/wiki/Skyline_(Honolulu) Only 4 car trains? At least it's not a 2 - 2.5 car joke of a train that is the Canada embarrassment Line in backwards Vancouver.

Fortunately, it's a walkthrough train and with SDO, it could eventually become a 6 car train, if there is ever a need to increase capacity by 50%.

https://honolulutransit.org/about/route-map , https://www.youtube.com/watch?v=2Wq3THzQZr0

https://en.wikipedia.org/wiki/Skyline_(Honolulu)#Rolling_stock

https://www.honolulu.gov/dts/skyline/home/

Hawaii's $10BN Railway Nightmare Explained https://www.youtube.com/watch?v=3xnrhm1KcB4

https://jfdatalinks.blogspot.com/search?q=Selective+Door+Operation

NSW OSCAR Trains

 https://en.wikipedia.org/wiki/New_South_Wales_H_set

Train length	81.55 m (267 ft 6+5⁄8 in)
Car length	20.34 m (66 ft 8+3⁄4 in) (OD) 20,435 mm (67 ft 1⁄2 in) (ON/ONL)

https://en.wikipedia.org/wiki/New_South_Wales_H_set#Design

An 8 car train stopping at a 6 car station.

"Example of selective door operation. The doors in the first 2 carriages are not opened, because the platform is too short for an 8-carriage OSCAR train." https://en.wikipedia.org/wiki/Selective_door_operation

https://en.wikipedia.org/wiki/Sydney_Trains

https://jfdatalinks.blogspot.com/search?q=Selective+Door+Operation

Selective Door Operation (SDO)

 https://en.wikipedia.org/wiki/Selective_door_operation#UK_variations

SDO is a great way to add an extra car at both ends of a train. Thus, a 3 car train can become 5 & a 6 car train could become 8. 

https://en.wikipedia.org/wiki/London_Underground_S7_and_S8_Stock#Features

https://en.wikipedia.org/wiki/London_Underground_S7_and_S8_Stock#/media/File:Articulate_section_S_stock.JPG

https://www.witpress.com/elibrary/wit-transactions-on-the-built-environment/74/12046

https://www.rssb.co.uk/research-catalogue/CatalogueItem/T686

The Chicago L can run up to an 8 car train, because that's the maximum station platform length. If the L can ever have walkthrough trains, then an 8 car train could become a 10 car train with SDO.

Stubborn Vancouver & BC just can't seem to allow for proper comprehensive transportation planning. 

Unfortunately, the multibillion dollar Canada+Line wasn't designed for significant future capacity. No five car trains, just a 2.5 car joke. There was a lack of vision to connect the Horseshoe+Bay ferry+terminal with downtown Vancouver and the airport.

https://jfdatalinks.blogspot.com/search?q=Selective+Door+Operation

Passenger Train Lengths

 https://jfdatalinks.blogspot.com/search?q=Passenger+Train+Lengths

Train length	4-car: 82.87 m (271 ft 11 in) 5-car: 102.86 m (337 ft 6 in)
Car length	DM vehs.: 21,446 mm (70 ft 4 in) Others: 19,990 mm (65 ft 7 in)

https://en.wikipedia.org/wiki/British_Rail_Class_710#Operation 68' or 67.5' x 4 or 5 car trains.

Train length	S7: 117.45 m (385 ft 4 in) S8: 133.68 m (438 ft 7 in)
Car length	17.44 m (57 ft 3 in) (DM) 15.43 m (50 ft 7 in) (NDM)

https://en.wikipedia.org/wiki/London_Underground_S7_and_S8_Stock

Selective door operation (SDO) is used at some stations where the platform is shorter than the train, such as at Baker Street https://en.wikipedia.org/wiki/London_Underground_S7_and_S8_Stock#Features

Train length	101.350 m (332 ft 6.2 in)
Car length	DMOS vehs.: 19.995 m (65 ft 7.2 in) Others: 19.660 m (64 ft 6.0 in)

https://en.wikipedia.org/wiki/British_Rail_Class_378#Design_and_features

The first 2 SkyTrain lines only have 80m stations, which can accomodate 5 of the newest cars. However, with SDO a 5 car train can become 7.

The Canada embasement Line was only designed to have 50m stations, not 152m stations like the Montreal Metro. Unfortunatly, the underbuilt Canada Line stations weren't designed to accommodate 5 car trains, only a 2.5 car joke of a train. Getting past the half-car B$, three 20m cars would form a 60m train. SDO can not only make a 3 car train possible, but a 5 car train length of 100m, despite its absurd 50m platform. It just would have been better to have built proper big city stations in the first place.

Of course Vancouver would opt to have shorter underground train stations than Montréal, Toronto, Edmonton, Seattle, SF & LA, because shorter trains help to increase urban transportation congestion. Unfortunatly, increasing congestion is a key component of the Vancouver city planning mentality & BC in general.

https://jfdatalinks.blogspot.com/search?q=Selective+Door+Operation

SDO for short stations vs. long trains and stations

Although the station platform only allows room for a three-car trainset, when the station was first opened a six-car trainset was used on the line. In this case, only the first three train cars' doors opened at this station (selective door operation). It was not until 22 July 2006 that a dedicated three-car trainset began service on the line. https://en.wikipedia.org/wiki/Xiaobitan_metro_station

https://en.wikipedia.org/wiki/Selective_Door_Operation (SDO)

https://en.wikipedia.org/wiki/Taipei_Metro#Platforms

https://en.wikipedia.org/wiki/Multiple_unit

SDO is such a great way to add a couple of cars without having to extend the platform until its absolutely necessary.

https://www.youtube.com/watch?v=TNtT0U-5zME ber

https://www.youtube.com/watch?v=0epKxaeCCHE sth

https://jfdatalinks.blogspot.com/search?q=Selective+Door+Operation