Nippon Sharyo DMU

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Nippon Sharyo DMU
Nippon Sharyo DMU of Union Pearson Express
Manufacturer Nippon Sharyo
Nagoya, Japan (manufacturing)
Rochelle, Illinois, United States (final assembly)[1]
Constructed 2013–present
Number under construction SMART 4
Number built SMART: 14
UP Express: 18
Capacity 79 seated
80 standing
Car length 85 ft (25.91 m)
Maximum speed UPX: 90 mph (145 km/h)[2]
SMART: 79 mph (127 km/h)
Prime mover(s) Cummins QSK19-R[3]
Power output 760 hp (567 kW)
Transmission hydraulic
AAR wheel arrangement 2-B
Track gauge 4 ft 8 12 in (1,435 mm)

The Nippon Sharyo DMU is a model of diesel multiple unit passenger train designed and manufactured by Nippon Sharyo for the North American market, and compliant with FRA Tier 1 crash-worthiness standards. It has been ordered by Sonoma–Marin Area Rail Transit (SMART) in Sonoma and Marin Counties, California, and by Metrolinx for the Union Pearson Express airport link in Toronto, Ontario.

The vehicles are designed to be convertible to electric multiple unit operation.[4]


Each Nippon Sharyo DMU is powered by one Cummins QSK19-R[3] diesel engine with hydraulic transmission and regenerative braking, and meets US EPA Tier 4 emission standards. Structurally each DMU is FRA Tier 1 compliant with crash energy management features, making it capable of operating on the same line with standard North American freight trains without the need of special waivers. Braking energy is converted into electricity by the auxiliary power generator, and helps to provide on-board lighting and heating.[5]

The DMU is offered in three variants that shared the same mechanical design:

  • A-car: one aerodynamic gangway-less end with full-width cab, one flat non-cab end with gangway, equipped with one ADA-compliant bathroom
  • B-car: similar to A-car but with service bar instead of bathroom
  • C-car: similar to A-car but the aerodynamic end was replaced with a flat end with gangway and cab, so it can be run either as middle car or end car of a train.


Nippon Sharyo DMU in SMART livery

Sonoma Marin Area Rail Transit[edit]

Sonoma–Marin Area Rail Transit (SMART) ordered 14 cars in December 2010.[6] Half of the cars were ordered as A-car and the remaining as B-car.

In June 2015 SMART received a grant from California State Transportation Agency (CalSTA) to purchase 3 C-cars.[7] These would have allowed SMART to use 3 train sets with a third car in the middle. In April 2016, SMART's general manager negotiated with CalSTA and Nippon Sharyo to adjust the order so SMART will receive 2 more full train sets bringing their fleet size to the required 9 (18 cars) needed for service to Cloverdale.[8]

The first cars, numbered 101 and 102, were delivered to SMART in April 2015. The final cars from the original order, numbered 113 and 114, arrived in December 2015.

Union Pearson Express[edit]

A UP Express Nippon Sharyo two-car DMU in service

Seven trains comprise the fleet of Union Pearson Express (UP Express), grouped into 4 three-car and 3 two-car train sets (for a total of 18 cars).[4] Union Pearson Express units feature enclosed overhead luggage bins as required by Transport Canada, and an enhanced enclosed luggage tower.

The first cars were delivered to UP Express in August 2014. All 18 cars ordered were delivered and entered service by June 2015.


TriMet considered ordering a two-car train for its Westside Express Service to supplement its fleet of Colorado Railcar DMUs. MBTA also purchased an 18-car option from SMART for its proposed Indigo Line service.[9]

Incidents and accidents[edit]

A July 2016 fire aboard one of Toronto's units revealed a fatal design flaw in the Cummins engine's crankshaft. Despite fundamental problems with the rail line itself, and advice from Cummins that addressing the problem could be deferred until the mid-point of the engines' life-cycles, the fire was used to justify the delay of SMART revenue service until all engines could be serviced to correct the problem.[10]

See also[edit]


  1. ^ "NEWS AND MEDIA - 2014 August". Union Pearson Express. Retrieved 2016-02-16.
  2. ^ "Nippon Sharyo USA Products". Retrieved 2015-04-21.
  4. ^ a b "Union Pearson Express: The Project/Vehicles". Archived from the original on 2015-03-18. Retrieved 2016-02-21.
  5. ^ "SMART Technical Specification for Diesel Multiple Units" (PDF). 20 January 2010. Archived from the original (PDF) on 6 June 2014.
  6. ^ "SMART Rail and Pathway Project Overview" (PDF). Retrieved 2014-06-05.
  7. ^ "SMART secures $11 million grant to purchase three more rail cars". Marin Independent Journal]]. 2015-06-30.
  8. ^ "SMART Board of Directors Packet April 6th 2016." N.p., n.d. Web. <>.
  9. ^ "WES Ridership and Fleet Requirements" (PDF). April 9, 2014. Retrieved 2014-10-01.
  10. ^ Moore, Derek (14 October 2016). "SMART spurred by engine failure on Toronto rail car to replace engines on its brand-new cars". The Press Democrat. Retrieved 16 October 2016.