Novelty 2024: 2. Class IC compartment car Bm 235 in product colors of the DB in Epoch IV. The groundbreaking concept of the IC `79 was introduced by the Bundesbahn with the well-known slogan "Every hour, every class" at the beginning of the summer timetable in 1979. This new way became necessary because the purely first-class intercities could hardly be operated economically at that time due to the ongoing loss of passengers. With the introduction of the second car class, the clock was simultaneously raised to an hourly rhythm. The desired reduction of travel times was achieved by the expansion of many routes and the increase of maximum speeds. These accelerated trains no longer led to luggage and post cars to further time savings and were for a quick change in the junction stations to blocks 1. Class, dining car and 2. Class divided. After the success of the concept, the IC network was expanded from four to five lines in 1985. To this day, the IC represents an important backbone in long-distance rail transport.