Some of Dannish (DSB's) trains give us great impact, since their design is very unique. However, these designs are lead from practical reasons. Nowadays, tube-like diesel cars (IC3) are exporeted to many countries, and short-body-united commutor trains are being introduced in Stockholm and Tokyo.Twenty years ago, Dannish train network was splitted by many inner seas, and sometimes boats carried trains. A long express trains needed to be splited to fit into the boat, so they needed to have a pass-way door at the cabin. A unique design was developed to fulfill this requirement, and it has turned out to be a great success.