An air-line railroad was a railroad that was relatively straight, following a shorter (and thus, presumably quicker) route instead of a longer, winding route. In their heyday, which was prior to aviation, they were often referred to simply as "air lines". For example, a 1903 novel indicates a character's success by noting his position as "superintendent of passenger traffic of the New York and Chicago Air Line", a fictitious railroad. Dictionary definition Webster's 1913 dictionary gives the definition "Air line, a straight line; a bee line. Hence Air-line, adj.; as, air-line road." Usually a railroad is built curving alongside a river, to avoid hill slopes. Public reaction Air line railroads began to be built in the mid-nineteenth century. As early as 1853, the New York Daily Times ran a satirical article mocking the trend, suggesting that the fad for an "air line" name was being used to float dubious investments: The "air-line" is three miles and nine-thirteenths shorter from Quattlebum to Squashtown than the present traveled route by the Conger Creek railroad.... Though we know there is already a railroad in operation between Quattlebum and Squash Town, parallel with and not far from our air-line... we feel satisfied that the immense current of travel, now passing by Conger Creek, must be changed, in the twinkling of an eye, to the air-line road. What sane individual, starting at Quattlebum and bound for Squash, will take the Conger Creek road when he can go by way of Shootsburg in two minutes less time, and at very little more cost? When actual air travel began in the United States, the older usage of the phrase "air line" led to confusion. During a spate of interest in aviation shares on Wall Street following Charles A. Lindbergh's trans-Atlantic flight in 1927, Seaboard Air Line shares actually attracted some investor curiosity because of the name's aviation-related connotations; only after noticing that Seaboard Air Line was actually a railroad did investors lose interest. List of air line railroads Seaboard Air Line Railroad (before 1946 called the Seaboard Air Line Railway, 'SAL'), a major system in the U.S. South, now part of CSX Air-Line Railroad (North Carolina), part of the Southern Railway Air-Line Railroad (South Carolina), part of the Southern Railway Air Line Railroad (Texas), incorporated 1850, predecessor of the Southern Pacific Company Atlanta and Birmingham Air Line Railway, part of the Seaboard Air Line Railroad Atlanta and