deutsche bahn says the demands are unaffordable.d berlin. motorway sliproads and border crossings with france, poland and the czech republic are also affected. our berlin correspondent jessica parker told us more about why these strikes are happening. i'm in the heart of berlin. you can see the brandenburg gate behind me. but swing round here and you've got a line of tractors. there are actually fewer here than there were a couple of days ago. but it is part of an ongoing protest by farmers against plans to phase out agricultural fuel subsidies. now, in some cases, tractors are parked up like this in city centres. in other cases, they are doing rolling blockades across the country, causing travel disruption. adding to that, today, you have got the start of a three—day strike by train drivers who are in a dispute with the national rail operator deutsche bahn over pay and working conditions. it is all a headache, of course, for the german government that has already been dealing with a budget crisis. there are also sluggish economic f