The Clay Street Hill Railroad was the first successful cable hauled street railway. It was located on Clay Street, a notably steep street in San Francisco in California, United States, and first operated in August 1873. The promoter of the line was Andrew Smith Hallidie, and the engineer was William Eppelsheimer. Accounts differ as to exactly how involved Hallidie was in the inception of the Clay Street Hill Railway. One version has him taking over the promotion of the line when the original promoter, Benjamin Brooks, failed to raise the necessary capital. In another version, Hallidie was the instigator, inspired by a desire to reduce the suffering incurred by the horses that hauled streetcars up Jackson Street, from Kearny to Stockton Street. We celebrate this feat of engineering with an AI image of a tram …