CWR	Continuous welded rail
BoM	Bureau of meteorology
RTPM	Rail-temperature-prediction model
RMSE	Root mean square error
MAE	Mean absolute error
R2	Coefficient of determination
ANN	Artificial neural network
SVM	Support vector machine
RF	Random forest
XGBoost	Extreme gradient boosting
TSLAM	Train-speed-limit alarm-map
DAQ	Data acquisition system
CNU	Chungnam national university
KMA	Korea meteorological administration
TSI	Total solar irradiance
GHI	Global solar irradiance
DHI	Diffuse horizontal irradiance
DNI	Direct normal irradiance
API	Application programming interface
OWM	Open weather map
GUI	Graphical user interface
PM	Particulate matter