Doctor Yellow

"Doctor Yellow" is the nickname given to the high-speed test trains that were used to monitor the conditions of track and overhead lines. The trains are based on their normal passenger carrying counterparts and look very similar to them, with line inspections usually being carried out at full speed.
The "Doctor" part of their name comes from their role of monitoring the track and overhead lines, while the "Yellow" comes from their bright yellow coloration. The original color scheme of yellow with blue stripes came from reversing the colors on cape gauge (3 ft 6 in, 1,067 mm) track recording cars, with their color scheme being blue with a yellow stripe.
Running schedules for Doctor Yellow trains are not made public.
Class 921 Profile.png|Class 921 non-powered track recording car (1962 – 1980)
Shinkansen Class 922 T3 SCMaglev.jpg|Class 922 Shinkansen (1964 – 2005)|link=Class 922 Shinkansen
Shinkansen Class 923 Maibara.jpg|Class 923 Shinkansen (2000 – Present)|link=Class 923 Shinkansen
Shinkansen Class 925 Takasaki.jpg|Class 925 Shinkansen (1979 – 2002)|link=Class 925 Shinkansen
Shinkansen Class E926 Omiya.jpg|E926 Series Shinkansen (2001 – Present)|link=E926-Series Shinkansen
Category:JR Group trains
Category:Electric trainsets
Category:Locomotives
Category:Electric locomotives
Category:3 foot 6 inch gauge
Category:Narrow-gauge
Category:Narrow-gauge locomotives
Category:Japanese locomotives
Category:Japan
Category:Passenger locomotives
Category:Standard gauge locomotives