A hot box is the term used when an axle bearing overheats on a piece of railway rolling stock. The term is derived from the journal-bearing trucks used before the mid-20th century. The axle bearings w
Hot axle box detector at Cogload Junction, England
A wheelset from a GWR wagon showing a plain, or journal, bearing end
The Mississauga train derailment, also known as the Mississauga Miracle, occurred on November 10, 1979, in Mississauga, Ontario, Canada, when a CP Rail freight train carrying hazardous chemicals derai