The story
Heinrich Imhoff was the pioneer of the Basler tramways who in 1880 obtained the concession from the local government in Basel to operate a horse-drawn "Tramomnibus". On 11 July 1881, a horse-drawn omnibus, popularly known as the "Rösslitram", began to operate. According to a fixed timetable, it connected the Badischer Bahnhof (which at that time stood at today's Messeplatz) with the Centralbahnhof (today's SBB railway station) crossing the Rhine over the Middle Bridge every 20 minutes. There were 6 coaches and 42 horses in service. The journey from station to station took 22 minutes. The Rösslitram ran without rails like a normal carriage on the road. The carriages were pulled by two horses, and a third horse had to be harnessed for each ascent on the Steinenberg. The operators were often negotiating for a better concession from the city of Basel and in 1892 the city council of Basel decided to build their own tramway.
From Wikipedia’s article on Basler Verkehrs-Betriebe, shared under CC BY-SA 4.0.4