underneath the bearing-out on the entrance side of berlin international congress center is the mouth of a tunnel-system underneath junction messdamm | neue-kantstr. a projected underground train line never was buildt, so the tunnels only provide access to car parking and save crossing of the junction for pedestrians.
on the opposite corner of the junction is the zob (zentraler omnibus bahnhof - central busstation). german intercity bussystem just got liberated (since 60 years the german rail was protected legally from competition of intercity busses). so, beside the usual busses to mainly eastern european cities, there are departing cheap buses to german cities now. these are not the ususal means of transport for visitors of nearby fair and congress center, but for nomadic workers, backpackers or price-concious groups like the women, i spotted waiting inside the bus terminal. they seem to have spend the money, they saved on transport for shopping in berlin.