KTT - KCR Through Train Guangdong Through Train (MTR) 九廣通直通車
KTT in standard livery
In service	1998–2023
Manufacturer	SLM and ABB (locomotives) Kinki Sharyo (coaches)
Built at	Winterthur and Zürich, Switzerland (locomotives) Osaka, Japan (coaches)
Constructed	1995
Entered service	28 August 1998[1]
Number built	2 locomotives and 12 coaches
Fleet numbers	Kowloon Through Train
Capacity	112 (first class car), 72 (premium class car)[2]
Operators	MTR Corporation
Lines served	MTR intercity services along East Rail line
Specifications
Car length	25.5 m (83 ft 8 in) (coaches)[3] 18.5 m (60 ft 8 in) (locomotives)[2]
Width	3.05 m (10 ft 0 in) (coaches)[3] 3 m (9 ft 10 in) (locomotives)[2]
Height	4.6 m (15 ft 1 in) (coaches)[3] 4.31 m (14 ft 2 in) (locomotives)[2]
Floor height	1.25 m (4 ft 1 in)
Maximum speed	160 km/h (99 mph) (design)[2]
Weight	84 t (83 long tons; 93 short tons) (locomotives)[2] 56 t (55 long tons; 62 short tons) (premium class coaches) 55.5 t (54.6 long tons; 61.2 short tons) (first class coaches)
Traction system	ABB GTO–VVVF
Traction motors	8 × ABB 6FHA-7067 1.6–1.8 MW (2,100–2,400 hp) 3-phase AC induction motor
Power output	12.2 MW (16,400 hp)
Acceleration	1 m/s2 (3.3 ft/s2)
Deceleration	1 m/s2 (3.3 ft/s2) (service) 1.3 m/s2 (4.3 ft/s2) (emergency)
Electric system(s)	25 kV 50 Hz AC Catenary
Current collector(s)	Pantograph
Braking system(s)	Air
Safety system(s)	AWS (former), TBL (enhanced with ATP)
Coupling system	Buckeye
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

KTT (simplified Chinese: 九广通; traditional Chinese: 九廣通)^[4] is a train set used by the MTR Corporation Limited in Hong Kong on the Guangdong Through Train route. It is used on the Guangdong line (Hung Hom (Kowloon), Hong Kong - Changping - Guangzhou East) of the through train service.

The double-deck "KTT" trailers have lower bottom floor than the ordinary cars serving on the same pair of tracks.

After the Guangdong Through Train and all other intercity passenger services were suspended in early 2020 amidst the coronavirus pandemic, the KTT trains were placed into storage. Despite border reopenings, there are currently no plans to resume intercity services.

Rolling stock

Although the locomotive has a top speed of 200 km/h (124 mph), KTT only runs at a maximum service speed of 140 km/h (87 mph) on the Hong Kong section of the Guangzhou - Kowloon Railway and at 160 km/h (99 mph)^[2] on the Guangzhou - Shenzhen Railway. KTT now has ten compartments (Eight first-class compartments and two executive-class compartments).

Since March 2018, all of the KTT coaches have begun the minor refurbishment. Refurbished train feature reupholstered seats, new flooring, added train automatic broadcast system device and improved barrier-free facilities.