Those caused by speeding, such
as at Morpeth, Northumberland, in 1994, when a train took a curve at 40 kilometres an
hour above the speed limit;
buffer stop crashes, such
as the Cannon Street accident in 1991, when two people died; and those caused by trains passing red signals.
It is appropriate
as this point to add that if Bolin & Eriksson's conditions in the last paragraph were true, carbonated beer (Bohren, 1987) and soda «pop»
as we know it would be an impossibility with their «
buffer» factor (see below); rain and fresh water would not show the observed equilibrium pH of 5.7 (Krauskopf, 1979); and experiments would not had shown complete isotopic equilibrium between CO2 and water in just
hours, which in turn is the prerequisite for routine stable isotope analysis involving CO2 (Gonfiantini, 1981).