The year before last I went to the ATHS show in Winchester for the first time. I saw A book there on Saturday called " 100 Years of Semi Trucks",but I didn't buy it.I kept thinking about it and decided I was going to buy it the next day,but ended up going on A side trip to Altoona,Pa. and never got back to the truck show. I ended up ordering the same book from Amazon.com,and I don't remember the price but it was money well spent.I had it out today looking through it,and this one paragraph on page 21,chapter 3,says so much about how trucking has changed from the 30's to today-" Driving trucks back in the 1930's was not easy. Although the highways were improving,riding comfort was not what it is today.Most of the roads were two-lane highways and in the mountainous regions,a driver could wear himself out by all the frequent shifting. 'The First 50 Years',a history of Consolidated Freightways,recounts a run by a C.F. driver in 1937 from San Francisco to Reno on old Route 40. From Roseville,California,to Reno,a distance of 125 miles,the driver shifted gears 844 times. On a 36-mile stretch from Roseville to Colfax , he shifted 318 times in 1 hour and 58 minutes. And on another stretch from Fox Farm to Donner Summit, a distance of 3.2 miles,the driver shifted 59 times in 18 minutes. A lot of trucks at this time had two sticks to shift,compared to one stick or an automatic today." ...WOW!