why do trains have to stop at ever station.. what if this way of switching cars could let the train roll on, not stop, saving energy and riders time?

Just skip to the 35 second mark and watch it to the 50 second mark, you'll get the idea without ever listening to a word of it, or wasting any timefound on http://www.bookofjoe.com/2010/12/26/index.html

Real unusual things from trailer washers, motorized wheels, to tank track Rolls Royces

Never seen one before, and something about the age of a black and white photo tells me that these are obsolete I have no idea at all what this is Ok, but why take it out if you have to add skis? Really early car phone Odd stuff on this tow truck 1890's and I was told it's a velocipede Lenin's 1922 Rolls Royce Silver Ghost snow machine. Most expensive snow machine conversion? or strangest use for

The early method of painting the stripes in the middle of the road (1920's? )

photos from http://www.jalopyjournal.com/forum/showthread.php?t=428585&page=920

Pedal car variety in the 1950's and 60's