Analysis of information sources in references of the Wikipedia article "港鐵中期翻新列車" in Chinese language version.
In Britain, historically train fronts were required to have a yellow panel in order to make them more visible, a move which came in the 1950s when newer diesel and electric trains were found to be far quieter than steam
In Britain, historically train fronts were required to have a yellow panel in order to make them more visible, a move which came in the 1950s when newer diesel and electric trains were found to be far quieter than steam